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【判断题】
准确度是指测量结果的正确性，准确度高表示系统误差大。A.
正确
B.
错误
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举一反三
【单选题】Who's that girl?
A.
This is my sister.
B.
This is my brother.
C.
That is my sister
D.
That is my brother.
【单选题】What is a characteristic of cardinal mark?
A.
Light rhythms indicating directional orientation
B.
Vertical stripes
C.
Square or triangular topmarks
D.
Number-letter combinations for identification
【单选题】—What’s the matter with Christine? —A letter from her parents in California________an attack of h
A.
31．—What’s the matter with Christine? —A letter from her parents in California________an attack of homesickness. A．took off
B.
gave off
C.
sent off
D.
set off
【单选题】LC 变压器反馈式振荡器电路如图 所示,下列说法正确的是 ( )
A.
只要将次级线圈 L 2 的同名端标在上端，就能振荡
B.
将次级线圈 L 2 的同名端标在下端，可能振荡
C.
将次级线圈 L 2 的同名端标在上端，可满足振荡的相位条件
D.
将次级线圈 L 2 的同名端标在下端，可满足振荡的振幅条件
【单选题】— _____________ Chinese books can you see? — 31. [ ]
A.
How many
B.
How much
C.
What colour
【多选题】Who's that woman.
A.
He is my grandmother.
B.
That is my grandmother.
C.
She is my grandmother.
D.
This is my grandmother
【单选题】What is one of the findings of the research?
A.
The effects of music do not last long.
B.
Piano music could interfere with your reasoning ability.
C.
Music, whether classical or rock, helps improve your memory.
D.
The more you listen to music, the higher your test scores will be.
【单选题】A: What day is it today? B: _____________
A.
Today is May 12
B.
It is Thursday.
C.
Today we will have an important meeting
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