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问题 单项选择题

均能利水，用以治疗水肿的一组药是（）

A.黄芩、黄芪、防风

B.桑寄生、桑白皮、桑椹子

C.甘遂、甘草、芫花

D.益母草、葶苈于、五味子

E.防己、五加皮、槟榔

答案

参考答案：E

改错题

下列各句中各有一处错误，找出并改正。

( )1. A girl name Jane gave you a call this morning. 

                                                                                                        

(     )2. All the boy students are enjoying to swim in the river.

                                                                                                         

(     )3. Thank you for come to see me.

                                                                                                          

(     )4. There's going to have a meeting tonight.

                                                                                                          

(     )5. All the food are on the table and the candles are on the cake. 

                                                                                                          

(     )6. My mother isn't here. She may be is in the study. 

                                                                                                          
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单项选择题

超声波从一种介质进入另一介质，入射声束轴线与界面法线所成的夹角称为（）

A、入射角

B、折射角

C、扩散角

D、反射角
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