【单选题】【消耗次数:1】
16. By using virtual reality programmes, it is possible to ____ deep into outer space without ever leaving Earth.
explore
find
escape
stay
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①  are
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①  compares ?
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①  could jump
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①  astronauts
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①  having orbited
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①  In terms of
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随机题目
【单选题】 <imgwidth="50"height="21"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk005.files/gctx_zk0051528.png">表示(  )
①  直径为60的孔,公差带代号为F7
②  直径为60的轴,公差带代号为F7
③  直径为60的孔,公差为F7
④  直径为60的轴,公差等级为F7
【单选题】 正确的A-A断面图是(  )<imgwidth="144"height="125"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk005.files/gctx_zk0054166.png">
①  <imgwidth="90"height="102"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk005.files/gctx_zk0054270.png">
②  <imgwidth="88"height="101"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk005.files/gctx_zk0054374.png">
③  <imgwidth="87"height="98"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk005.files/gctx_zk0054478.png">
④  <imgwidth="90"height="97"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk005.files/gctx_zk0054582.png">
【单选题】 标注球面的直径时,在尺寸数字的前面应加注(  )
①  S
②  <imgwidth="21"height="23"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk001.files/gctx_zk0011072.png">
③  <imgwidth="23"height="18"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk001.files/gctx_zk0011176.png">
④  <imgwidth="28"height="23"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk001.files/gctx_zk0011280.png">
【单选题】 标注两个直径均为20的圆时,正确的标注方法是(  )
①  <imgwidth="52"height="28"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0062930.png">
②  <imgwidth="63"height="23"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0063034.png">
③  <imgwidth="66"height="21"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0063138.png">
④  <imgwidth="63"height="25"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0063242.png">
【单选题】 下图中正确的退刀槽尺寸注法是(  )
①  <imgwidth="149"height="157"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0065985.png">
②  <imgwidth="191"height="158"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0066089.png">
③  <imgwidth="158"height="137"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0066193.png">
④  <imgwidth="170"height="156"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0066297.png">
【单选题】 粗糙度符号<imgwidth="87"height="38"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0064790.png">表示(  )
①  用任意方法获得的表面粗糙度,Ra的值为12.5m
②  用去除材料的方法获得的表面粗糙度,Ra的值为12.5m
③  用任意方法获方法获得的表面粗糙度,Ra的值为12.5mm
④  用不去除材料的方法获得的表面粗糙度,Ra的值为12.5m
【单选题】 标注圆的直径时,在尺寸数字的前面应加注(  )
①  S
②  <imgwidth="19"height="24"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk002.files/gctx_zk0021072.png">
③  <imgwidth="27"height="27"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk002.files/gctx_zk0021176.png">
④  <imgwidth="30"height="25"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk002.files/gctx_zk0021280.png">
【单选题】 表示基孔制配合的是(  )
①  <imgwidth="35"height="52"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0062040.png">
②  <imgwidth="35"height="53"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0062144.png">
③  <imgwidth="35"height="50"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0062248.png">
④  <imgwidth="39"height="54"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk006.files/gctx_zk0062352.png">
【单选题】 标注球面的直径时,在尺寸数字的前面应加注(  )
①  S
②  <imgwidth="19"height="24"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk004.files/gctx_zk0041075.png">
③  <imgwidth="27"height="27"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk004.files/gctx_zk0041179.png">
④  <imgwidth="30"height="25"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk004.files/gctx_zk0041283.png">
【单选题】 粗糙度符号<imgwidth="84"height="47"src="http://wljy.whut.edu.cn:80/uploadfiles/word/gctx_zk004.files/gctx_zk0044359.png">表示(  )
①  用任何方法获得的表面粗糙度,Ra的值为25m
②  用去除材料的方法获得的表面粗糙度,Ra的值为25m
③  用不去除材料的方法获得的表面粗糙度,Ra的值为25m
④  用不去除材料的方法获得的表面粗糙度,Ra的最大值为25m