【单选题】【消耗次数：1】
9. The goal is to keep this land alive, to ______ animal population and keep it growing.
①
insist
②
keep
③
preserve
④
kill
参考答案：
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相关题目
【单选题】
Quizzes are part of the lecture program to keep students engaged and keep them _________, for students to be able to check that they understood what was covered.
①
thinking
②
think a lot
③
to think
④
thought
【单选题】
It ______ to keep calm when confronted with dangers.
①
pays
②
takes
③
costs
④
deserves
【单选题】
9. -You’d better not go out now. It’s raining. -It doesn’t matter. My new coat can keep ______ rain.
①
in
②
of
③
with
④
off
【单选题】
Nowadays people spend more time exercising to keep _____.(
①
fitly
②
fitting
③
fit
④
fiitted
【单选题】
____ what the situation would be like, they decided to keep silent.
①
Knowing not
②
Not know
③
Not knowing
④
Having not known
【单选题】
How can you keep the machine （）when you are away?
①
run
②
to run
③
running
④
being run
【单选题】
A: How long can I keep the book? B: [填空].
①
Any period longer than four weeks, you will be fined
②
Four weeks, but you can renew it if you need it longer
③
You can check it on the computer over there
④
At most four weeks if you dont mind
【单选题】
_______every week for several hours is good to keep healthy.
①
Exercise
②
To exercise
③
Should exercise
【单选题】
Keep your office space looking good, ( ) your desk.
①
particular
②
especial
③
particularly
④
partial
随机题目
【单选题】
平面一般力系向一点O简化结果，得到一个主矢量R′和一个主矩m0，下列四种情况，属于平衡的应是（）。
①
R′≠0m0=0
②
R′=0m0=0
③
R′≠0m0≠0
④
R′=0m0≠0
【单选题】
压杆的柔度集中地反映了压杆的（）对临界应力的影响。
①
长度、约束条件、截面尺寸和形状；
②
材料、长度和约束条件；
③
材料、约束条件、截面尺寸和形状；
④
材料、长度、截面尺寸和形状。
【单选题】
以下有关刚体的四种说法，正确的是（）。
①
处于平衡的物体都可视为刚体
②
变形小的物体都可视为刚体
③
自由飞行的物体都可视为刚体
④
在外力作用下，大小和形状看作不变的物体是刚体
【单选题】
根据力的平移定理可知，可以把作用在刚体上点A的力平行移到任一点B，但必须同时附加一个力偶。这个附加力偶的矩等于（）
①
原来的力对新作用点B的矩
②
新力对原作用点A的矩
③
原来的力对任一点的矩
④
以上都不对