【单选题】【消耗次数：1】
Youd better tell the hotel well _______________ tomorrow.
①
check on
②
check in
③
check at
④
check to
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相关题目
【单选题】
— Could I make an appointment with Dr. Zhang to check my teeth tomorrow morning?— .
①
Certainly!
②
No, you cannot.
③
He isn’t in.
④
ok
【单选题】
Sometimes a bus _____gets on the bus to check the tickets.
①
agent
②
officer
③
conductor
④
inspector
【单选题】
We feel it is high time that the Government ____
something to check the inflation.
①
did
②
do
③
should do
④
would do
【单选题】
We feel it is high time that the Government _____something to check the inflation.
①
did
②
do
③
should do
④
would do
【单选题】
If you check the route to your ____before starting off, you will save much trouble.
①
aim
②
purpose
③
destination
④
determination
【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】
A: Do you have any check-in luggage? B: [填空]. Theyre heavy. I hope theyre not overweight. A: Theyre just under the maximum weight.
①
Yes, Ill show you
②
Yes, two pieces
③
Yes, there you are
④
Yes, not many
【判断题】
答题说明：句子没有语法错误请选择“正确”，有语法错误请选择“错误”This old man was none other than the medical officer what had given Jim the health check.
①
正确
②
错误
【单选题】
设有Teachers表，该表的定义如下：
CREATE TABLE Teachers(
Tno CHAR(8) PRIMARY KEY,
Tname VARCHAR(10) NOT NULL,
Age TINYINT CHECK(Age BETWEEN 25 AND 65) )
下列插入语句中，不能正确执行的是（ ）。
①
INSERT INTO Teachers VALUES(T100,张宏,NULL)
②
INSERT INTO Teachers(Tno,Tname,Age) VALUES(T100,张宏,30)
③
INSERT INTO Teachers(Tno,Tname) VALUES(T100,张宏)
④
INSERT INTO Teachers VALUES(T100,张宏)
随机题目
【单选题】
设<img class=jc-formula data-tex={ \alpha }_{ 1 },{ \alpha }_{ 2 } src=https://huaweicloudobs.ahjxjy.cn/F7A9179A3B95E4A689239C902E737612.png style=vertical-align: middle;/>是齐次线性方程组 Ax=0的两个解向量, <img class=jc-formula data-tex={ \beta }_{ 1 },{ \beta }_{ 2 } src=https://huaweicloudobs.ahjxjy.cn/677A921FCF83E4151EDA6846AC691BB6.png style=vertical-align: middle;/>是非齐次线性方程组 Ax=b的两个解向量， 则 ( )
①
<img class=jc-formula data-tex={ \alpha }_{ 1 }+{ \alpha }_{ 2 } src=https://huaweicloudobs.ahjxjy.cn/98BBDE0A4EFEE09BB8F566CD2715C8F7.png style=vertical-align: middle;/>是 Ax=0的解；
②
<img class=jc-formula data-tex={ \beta }_{ 1 }-{ \beta }_{ 2 } src=https://huaweicloudobs.ahjxjy.cn/BF39B64659F7FEB5CBDDEC9EA5850379.png style=vertical-align: middle;/>是Ax=0的解；
③
<img class=jc-formula data-tex={ \alpha }_{ 1 }+{ \beta }_{ 1 } src=https://huaweicloudobs.ahjxjy.cn/51DC9D39B9996C3CB0ABB213D8FA6EA0.png style=vertical-align: middle;/>是 Ax=0的解；
④
<img class=jc-formula data-tex={ \alpha }_{ 1 }-{ \beta }_{ 1 } src=https://huaweicloudobs.ahjxjy.cn/6F764E5023C0764878568584418D58B9.png style=vertical-align: middle;/>是 Ax=b的解.
【单选题】
设连续型随机变量X的密度函数有f(x)=f(-x)，F(X)是X的分布函数，则下列成立的有（A）F(-a)=F(a); （B）F(-a)=(1/2)F(a);（C）F(-a)=1-F(a);（D）F(-a)=(1/2)-F(a).
①
(A)
②
(B)
③
(C)
④
(D)