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【判断题】
骨骼肌收缩时肌小节缩短,粗肌丝和细肌丝的长度无变化。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】When the school building began to shake,the teachers ran downstairs _____ all the students. The teachers are real heroes. [ ]
A.
after
B.
with
C.
before
D.
at
【单选题】---- What do people mean when they shake their fists? ---- ________. It has different meanings in different countries.
A.
It depends.
B.
Sounds great.
C.
I don’t know.
D.
Don’t mention it.
【单选题】Which of the following is true according to the passage?
A.
Americans shake their hands when first introduced to new people.
B.
Americans usually shake hands while parting.
C.
Social kissing is not acceptable between two women in America.
D.
Americans call each other's name when greeting.
【单选题】It is the _________ in Britain that young people often do not shake hands when they meet someone for the first time.
A.
custom
B.
habit
C.
hobby
D.
favour
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