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问题 多项选择题

下列可作为磨具结合剂的是（）。

A.陶瓷胶合剂

B.树脂胶合剂

C.橡胶胶合剂

D.水泥胶合剂

答案

参考答案：A, B, C

句型转换

按要求完成句子。

1. What other things did you do on your day off?( 变为同义句)

    ______ ______ did you do on your day off?

2. Our class had a great time on the school trip. ( 变为同义句)

    Our class  ______ ______ on the school trip.

3. Our school trip was very interesting. (划线部分提问)

    ______ ______ your school trip?

4. There was only one sandwich. (划线部分提问)

    ______ ______ ______ ______ there ?

5. He met Tina on his way home.(变为否定句)

    He ______ ______ Tina on his way home.
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单项选择题

超声纵向分辨力为()

①区分平行于超声束的两个物体的能力

②区分垂直于超声束的两个物体的能力

③与深度、纵向和区域分辨力相同

④与方位、角度及横向分辨力相同

A．①③

B．②④

C．①②③

D．①②④

E．①②
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