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【单选题】
Inmarsat-B/F系统采用了点波束技术,其目的是( )。A.
减小船站重量
B.
避免干扰
C.
防止误报警
D.
合理利用功率与频率资源
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反馈参考答案：
举一反三
【简答题】选择课文中你最喜欢的一句话,默写下来。
【单选题】_____ to make a speech, he said he would be glad to.
A.
When asked
B.
When asking
C.
When he was asking
D.
When to ask
【单选题】I want to know _____ .
A.
when will he come back
B.
when he will come back
C.
when he comes back
D.
when is he coming back
【简答题】A．When he goes for a walk. B．When he drives the car. C．When he passes somebody. D．When he chats with Peter.
【单选题】以下哪项不是三度房室传导阻滞的心电图的表现
A.
P波与QRS波无关
B.
P频率＜R频率
C.
P-P间期相等
D.
QRS波群形态取决于阻滞部位
E.
心室率可在40次/分以下
【单选题】The woman lived in Germany______.
A.
when he was first born
B.
when he was a child
C.
when he has his first child
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