子宫峡部相当于()
A.子宫颈的最狭窄部分
B.子宫体的最狭窄部分
C.子宫颈 * * 上部
D.子宫颈 * * 部
E.子宫颈与子宫体形成最狭窄部分
参考答案:E
- I heard that Lucy went to your house to say sorry to you.
- Yes. She went to my house _______ we were having dinner.
A. while B. which C. that
如图所示电路,电源电压保持不变,当闭合S2、断开S1时,电流表的示数为0.2A,电阻R2消耗的电功率为1.2W;当闭合S、S1时,电压表的示数为10V,下列选项错误的是
A. 闭合开关S1后,电流表示数将变小
B. 电源电压为10V
C. 电阻R1的阻值为20Ω
D. 电阻R2的阻值为30Ω