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【单选题】
中、低压系统里，镀锌风管的长边尺寸6—2000mm时，板材厚度应为（）A.
0.75mm
B.
1.0mm
C.
1.2mm
D.
1.6mm
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反馈参考答案：
举一反三
【单选题】What will the woman probably do?
A.
Drop out of the music theory class
B.
Listen to recordings of various instruments
C.
Read the textbook before the next lecture
D.
Use a computer to search for information
【简答题】The woman suggests the man __________． [A] listen to her lectures attentively [B] drop the class period [C] ask others after class [D] record the lectures
【单选题】“Dear, if you listen to me, you ______ have some candies as a reward,” the woman told her little son.
A.
shall
B.
do
C.
should
D.
must
【单选题】What advice does the woman give the man?
A.
To practice with others.
B.
To listen to more English program.
C.
To practice himself.
【简答题】正常人基础代谢率平均值随年龄增长发生()变化。 (A)逐年升高 (B)保持不变 (C)逐年降低 (D)先升高再降低
【单选题】给定命题“若a＞-3，则a＞-6”，则其否命题是（ ）
A.
若a＞-3，则a≤-6
B.
若a≤-3，则a＜-6
C.
若a≤-3，则a≤-6
D.
若a≥-3，则a≤-6
【单选题】已知a，b，c∈R，命题“若 =3，则 ≥3”，的否命题是 （ ）
A.
若a+b+c≠3，则 <3
B.
若a+b+c=3，则 <3
C.
若a+b+c≠3，则 ≥3
D.
若 ≥3，则a+b+c=3
【简答题】已知ab=2．若-3≤b≤-1，则a的取值范围是______．
【单选题】Listen again to part of the conversation．Then answer the question. Why does the woman say this:
A.
To request that the man speak more softly
B.
To express her dislike of thermodynamics
C.
To agree that lack of time is a problem
D.
To inform. the man that she needs to leave
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