甲股票每股股利的固定增长率为5%，预计一年后的股利为6元，目前国库券的收益率为10%

观察自己家中的家用电器的能量转化，填写表格．

刑警队需要充实缉毒组的力量，到底由谁来参加，已商定以下意见：（1）如果甲参加，则乙也参加；（2）如果丙不参加，则丁参加；（3）如果甲不参加或丙参加，则队长戊参加；（4）队长戊和副队长己不能都参加；（5）上级决定副队长己参加。 根据以上规定，下列推理完全正确的是（）。

人甲、丁、己参加

B．丙、丁、己参加

C．甲、乙、己参加

D．甲、乙、丁、己参加

用所给单词的正确形式填空。

1. Jenny ___________ (run) with a kite on the playground now.        

2. I brush my ___________(tooth) in the morning and in the evening.  

3. The weather is cold and ___________ (cloud).                      

4. His aunt ___________ (make) dumplings now.                        

5. His brother___________ (drive) to work every day.                 

6. It's 9:00 now. The children are ___________ (have) an English class.

7. He lives near school. He ___________ (walk) to school.             

8. February  is the ___________(two) month in a year.                

9. How many ___________ (season) are there in a year?                

10. He often ___________ (watch) TV on Fridays.                        

某工程购置空调机组3台，单台出厂价2.2万元，运杂费率7%，则该工程空调机组的购置费为( )。

A．2.35万元
B．4.71万元
C．6.6万元
D．7.06万元

下列哪些药属于β-内酰胺类抗生素

A．头孢噻肟

B．萘啶酸

C．麦迪霉素

D．氨苄西林(氨苄青霉素)

E．克拉维酸(棒酸)