有关固定桥桥体龈端叙述正确的是（） A.龈端与粘膜紧密接触，避免食物嵌塞 B.应尽量

根据语境填入适当的短语或句子，补全对话。

A: It's time for dinner! __1__.  Don't you want it?

B: Fish and chips again! __2__.

A: Why do you say so? It used to be your favorite meal, right?

B: __3__, but I have had fish and chips three times a week.

A: Three times a week! You haven't had it for over a week.

B: But, can I have something else __4__?

A: Well, in that case you'd better go and cook your own supper.

B: Then I'll __5__.

关于葡萄胎超声表现，下列哪一项是正确的

A.子宫小于孕期 

B.双侧卵巢正常 

C.子宫大于孕期 

D.宫腔内无血流显像 

E.卵巢黄素囊肿是诊断葡萄胎的唯一征象

男性，48岁，近1周内发现血压升高，为156/98mmHg，服用利尿剂氢氯噻嗪降压效果不佳，且出现四肢行走无力，测血钾为2.2mmol/L。

该患者可首先给以何种处理

A．停用利尿剂

B．继续应用利尿剂同时补钾治疗

C．换用其他类型降压药

D．停用利尿剂，补钾治疗

IP54表示什么含义？