在图所示电路中，S闭合两灯同时这亮、S断开两灯同时熄的正确电路

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问题选择题

在图所示电路中，S闭合两灯同时这亮、S断开两灯同时熄的正确电路是（　　）

A．

B．

C．

D．

答案

答案：B

多选题

( ) 1. It's six o'clock. It's time to have dinner.	A.	a. 3: 00
( ) 2. It's four twenty. It's time to go home.	B.	b. 4: 20
( ) 3. It's ten. It's time for P. E. class.	C.	c. 8: 30
( ) 4. It's three. It's time for English class.	D.	d. 10: 00
( ) 5. It's eight thirty. It's time for computer class.	E.	e. 6: 00

单项选择题

既能活血调经，又能凉血消痈、养血安神的药物是（）。

A.丹参

B.川芎

C.桃仁

D.三棱

E.益母草