湖南省的地方剧种有[ ] A．湘剧和花鼓戏 B．黄梅戏 C．京剧 D．越剧

提前还款是指借款人具有一定偿还能力时，主动向贷款银行提出部分或全部提前偿还贷款的行为。( )

下列计算正确的是（　　）

A．x²+x³=x⁵

B．（x³）²=x⁹

C．x⁶÷x³=x²

D．x³•x²=x⁵

用所给词的正确形式填空。

1. —Can you _________ (come) to my party on Wednesday?

   —Sorry, I have _________ (go) to the doctor.

2. —Can she go to the movies?

    —No, she _________ (not can). She's _________ (play) soccer.

3. She can't come to your party, she __________ (have) tennis

   __________ (train) with the school team.

4. Thanks a lot for your _________ (invite).

    Thank you for __________ (invite) me to your party.

5. She's _________ (babysit) her little sister, she can't come.

6. There _________ (be) a baseball match tomorrow afternoon in our school.

7. I'll ask my _________ (America) friends to come to my birthday party next week.

8. We are going to learn some new __________ (subject), such as physics, _________ (chemist).

9. He has __________ (something) to do. He is free.

10. I don't know ___________ (who) you'll go to the movie with this evening.

用数字0，1，2，3组成无重复数字的四位数，这样的四位数的个数为（　　）

A．24

B．18

C．16

D．12

第一心音特点（）。

A.音调低，强度弱，性质低钝，持续时间短，通常只在儿童和青、少年可听到

B.音调较低，强度较响，性质较钝，历时较长，与心尖搏动同时出现，心尖部听诊最清晰

C.音调较高，强度较第一心音低，性质较第一心音清脆，在心尖搏动之后出现，心底部听诊最清楚

D.低调、沉浊、很弱，心尖部及其内侧较明显

E.音调高、历时短促而响亮、清脆，呈拍击样，在心尖内侧较清楚