腹部四步触诊不能了解的是A．胎儿大小 B．胎先露 C．胎方位 D．胎儿有无先天性畸形

承诺必须具备如下要件，才能产生法律效力()。

A.承诺必须由受要约人或其代理人作出

B.承诺必须在要约的有效时间内作出

C.承诺必须与要约的内容一致

D.承诺必须传达给要约人

我国妇女绝经年龄多在（）

A.35～40岁

B.40～45岁

C.44～54岁

D.50～58岁

E.55～60岁

根据对话情景，在空白处填入合适的句子。

(Jill is not feeling well, so her mother takes her to the hospital.)

Jill: Good morning, doctor.

Doctor: Good morning. 1.__________________?

Jill: This morning I had a pain in my head.

Doctor:  2.__________________?

Jill: I'm feeling even worse.

Doctor: Open your mouth and say "Ah".

Jill: Ah...

Doctor: You have a cold. Let me take your temperature. 3.__________________.

Jill: Is it serious?

Doctor: No, it isn't. 4.___________________.

Jill: Really? But I don't feel any better now.

Doctor: Well, take this medicine three times a day. 5.__________________.

Jill: OK. Thank you.

（）用于传输实时数据并提供服务质量QoS反馈，（）用于控制实时媒体流的传输，（）用于描述多媒体会话.

A、RTSP、RTP、SIP

B、RTP、RTCP、SDP

C、RTP、RTCP、SIP

D、RTSP、RTP、SDP

关于LDL的叙述不正确的是（）

A.主要结构蛋白是ApoB100

B.通过受体途径代谢

C.在血浆中生成

D.前体是VLDL

E.前体是LpA.