若单项式2a2bx﹣y与﹣3ax+yb4是同类项，则x=（），y=（）．

It was getting late. There was no noise in the forest. We could only hear the birds singing. And then, a bear—a big brown bear—came into the forest.

The bear stopped under a tall tree. He was very hungry. He looked up into the tree. There in the nut tree was his supper—a supper of nice nuts. But the nuts were high up in the tree. The hungry bear could not reach them. But he knew how to get his supper. He climbed up the tree.

Up and up he climbed. He climbed onto a big branch of the tree. He sat there and then shook(摇) the branch again and again. At last the branch broke. The brown bear fell down with the branch and nuts.

The bear sat up and looked around. With his big paws he picked up the nuts and ate them up.

小题1:How did the brown bear get his supper?

A．He climbed up the tree and ate the nuts there.

B．He shook the apples off a tree and ate them.

C．He picked up the nuts on the ground and ate them.

D．He fell down with the branch of the tree. Then he took the nuts and ate them.小题2:The bear was         .

A．black

B．brown

C．black and white

D．brown and black小题3:The story took place          .

A．in the morning

B．at noon

C．before evening ca

D．at midnight小题4:The word “branch” in this passage means           in Chinese.

A．树干

B．树叶

C．树枝

D．树桩小题5:Where did the bear eat the nuts?

A．in a forest.

B．outside the forest.

C．near a forest.

D．in front of the forest.

口服补液盐液体的张力为（）。

A.1／5张

B.1／4张

C.1／3张

D.1／2张

E.2／3张

肱骨内髁骨折畸形愈合出现手内肌萎缩的原因是哪一项（）.

A.尺神经炎

B.桡神经炎

C.正中神经炎

D.肌皮神经炎

E.腋神经炎

作为药物制剂质量指标的是

A．生物利用度

B．血浆蛋白结合率

C．消除速率常数

D．剂量

E．吸收速度

动态令牌产品包含哪些（）？

A、K5

B、K8

C、手机动态令牌

D、短信动态令牌