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【单选题】
RL 串联电路中 , 下列关系式正确的是 ( )A.
Z=R+L
B.
Z ＝ R+XL
C.
Z 2 ＝ R 2 +XL 2
D.
无法判断
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举一反三
【简答题】按照马斯洛的需要层次说，人的基本需要层次不包括()。 A.生活的需要 B.生理的需要 C.自我实现的需要 D.尊重的需要
【单选题】The main idea of the passage is that______.
A.
teachers should do as little as possible in helping students learn to read
B.
teachers should encourage students to read as widely as possible
C.
reading ability is something acquired rather than taught
D.
reading is more complicated than generally believed
【单选题】--Where is Bob? --He is in our ______ room. [ ]
A.
teacher
B.
teachers's
C.
teachers
D.
teachers'
【单选题】Those are the ___________ books. [ ]
A.
teacher'
B.
teachers'
C.
teachers's
D.
teachers
【判断题】矿渣硅酸盐水泥、火山灰质硅酸盐水泥、粉煤灰硅酸盐水泥、复合硅酸盐水泥的强度等级分为32.5、32.5R、42.5、42.5R、52.5、52.5R六个等级。( )
A.
正确
B.
错误
【简答题】通用水泥除了硅酸盐水泥、火山灰质硅酸盐水泥、粉煤灰硅酸盐水泥、复合硅酸盐水泥外，还有________？
【单选题】They are those ________ books. [ ]
A.
teacher's
B.
teachers's
C.
teachers
D.
teachers'
【单选题】Teachers required that all the students ___ their homework all alone.
A.
must finish
B.
would finish
C.
had to finish
D.
finish
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