近年来输血后肝炎主要由哪种病毒引起A．甲型肝炎病毒 B．型肝炎病毒 C．丙型肝炎病毒

下列句子中划线的词语使用正确的一项是（3分）

A．近期《乡愁》的作者余光中老先生做客无锡，受到了隆重的礼遇。

B．她到底是出身于文墨小康之家，虽没上过学，却也陶冶得一身书香，识文断字。

C．海子的《面朝大海，春暖花开》因为异常接近俗世生活而成为他的诗歌中的另类，也因为异常朴素温馨而格外惊心动魄。

D．新上任的厂领导积极开展市场调查，狠抓产品质量和开发，真可谓处心积虑。

以下不属于黄金理财产品的特点的是（）。

A.价值稳定

B.分散组合风险的能力强

C.抗系统风险能力强

D.抗市场不充分风险能力强

当螺杆泵的转子转动时，在吸入端，转子与定子橡胶衬套表面间不断形成封闭腔室，并向排出端作（）移动，在排出端消失，使液体从一端移向另一端，实现液体的举升。

A、摆动

B、横向

C、轴向

D、旋转

电容器能够通（）隔（）。

A、直流、交流

B、交流、直流

C、无法判断

D、A和B都有可能

Lying in the sun on a rock, the cougar saw Jeb and his son, Tom, before they saw it. Jeb put his bag down quickly and pulled his jacket open with both hands, making himself look big to the cougar. It worked. The cougar hesitated, ready to attack Jeb, but ready to forget the whole thing, too.
Jeb took off his jacket, grasped Tom and held him across his body, making a cross. Now the cougar’s enemy looked even bigger, and it rose up, ready to move away, but unfortunately Tom got scared and struggled free of Jeb.
"Tom, No!" shouted his father.
But Tom broke and ran and that’s the last thing you do with a cougar. The second Tom broke free, Jeb threw himself on the cougar, just as it jumped from the rock. They hit each other in mid air and both fell. The cougar was on Jeb in a flash, forgetting about Tom, which was what Jeb wanted. Cougars are not as big as most people think and a determined man stands a chance, even just with his fists. As the cougar’s claws got into his left shoulder, Jeb swung his fist at its eyes and hit hard. The animal howled (吼叫) and put its head back. Jeb followed up with his other fist. Then out of the comer of his eye, Jeb saw Tom. The boy was running back to help his father.
"Knife, Tom," shouted Jeb.
The boy ran to his father’s bag, while Jeb started shouting as well as hitting, to keep the cougar’s attention away from Tom. Tom got the knife and ran over to Jeb. The cougar was moving its head in and out, trying to find a way through the wall. Jeb was making out of his arms. Tom swung with the knife, into the cougar’s back. It howled horribly and ran off into the mountains.

Which of the following happened first

A．The cougar jumped from the rock.

B．Tom struggled free of his father.

C．Jeb asked Tom to get the knife.

D．Jeb held Tom across his body.