岩心出筒时要求丈量“底空”，所谓“底空”是指（）。A、取心钻头的长度 B、取心钻头至

女性患者，24岁，因突发心悸半小时来院，既往有类似发作史5年。查体：一般情况好，血压90/50mmHg，心率170次/分。心脏不大，律整，无杂音，双肺(-)。心电图检查QRS波群正常，P波不明显

所考虑最可能的诊断是

A．急性心肌梗死
B．甲亢
C．扩张性心肌病
D．低钾
E．正常心脏

Rick is a good man．He makes birthday cakes in a shop．His cakes are great and have very good prices，so many people buy his cakes．He makes friends with lots of his customers(顾客)．They all like him very much．One evening．he wants to go home，but many of his old customers come in．Rick smiles(微笑)to them，“I am sorry．It is late today．If you need cakes，please come tomorrow．”One of them takes out a nice cake and says to him，“You make so many great cakes for us．This birthday cake is for you．Happy birthday, Rick．”

小题1:Where does Rick work?  ________．

A．At school．

B．In the classroom．

C．In a shop．

D．At a party．小题2:When the customers come one evening，Rick _______．

A．is making cakes

B．is at home

C．wants to go home

D．is playing basketball小题3:His customers give him________．

A．many cakes

B．a birthday cake

C．some money

D．some fruit小题4:Rick’s customers like him because_________．

A．he’s a good man

B．his cakes are big

C．his cakes are at a very good price

D．A and C小题5:One evening, the customers come to Rick’s shop because________．

A．they want to buy cakes

B．it is Rick’s birthday that day

C．Rick asks them to come

D．they come for a party

“幽”的笔顺是（）。

实行责任内阁制国家的议会反对党组成一个准备上台的执政班子被称为（ ）。

水泥稳定碎石施工过程中，混合料摊铺时的含水率宜（）最佳含水率，以便宜于压实。

A.略高于

B.略低于

C.接近

D.等于