增强子的序列是A．含两组72bp串联(顺向)重复序列，核心部分为TGTGCAATTA

属于Ⅰ_c类的抗心律失常药物是（）

A.奎尼丁

B.利多卡因

C.普罗帕酮

D.胺碘酮

E.维拉帕米

正常人给予脂肪餐时胆总管扩张（）

A.正确

B.错误

C.是正常生理变化

D.是病理改变

关于账簿设置的说法，错误的是（）。

A．纳税人、扣税义务人会计制度健全，能够通过计算机正确、完整计算其收入和所得或者代扣代缴、代收代缴税款情况的，其计算机输出的完整的书面会计记录，可视同会计账簿

B．账簿、收支凭证粘贴簿、进销货登记簿等资料应一律保存10年以上，未经财政主管部门批准，不得销毁

C．扣缴义务人应当自税收法律、行政法规规定的扣缴义务发生之日起10日内，按照所代扣、代收的税种，分别设置代扣代缴、代收代缴税款账簿

D．生产经营规模小又确无建账能力的纳税人，若聘请专业机构或者人员有实际困难的，经县以上税务机关批准，可以按照规定建立收支凭证粘贴簿，进货销货登记簿或者税控装置

施工单位对施工作业人员的劳动防护，主要有以下几个方面（）。

A、签订劳动合同

B、提供安全生产作业环境

C、提供符合国家和本市规定标准的安全防护用具、安全防护服装

D、书面告知危险岗位的操作规程和违反操作规程操作的危害

E、根据季节和天气特点，采取预警和安全防护措施

Letter A

Dear Rose,

I like your programmes very much. I’m now writing to ask you something about American social customs. My American friends want me to join them in their dinner party. I am very happy and have decided to go, but I’m a little worried about it, too. The social customs in my country are very different from here, so I’m afraid of making mistakes.

Should I bring a present, such as sweets or flowers Should I arrive on time or a little late At the dinner table, how can I know which fork or knife to use How can I let the family know that I’m thankful for their kindness

Wang Lin

Letter B

Dear Wang Lin,

It’s a good idea to bring a small present when you go to a dinner party. Flowers are always nice, or you may bring a bottle of wine if you know that your friends drink it.

You should arrive on time or five to ten minutes late. Don’t get there early. If you’re going to be more than fifteen minutes late, you should call and tell them.

Try. to be free at the dinner table. If you don’t know about choosing the right fork or knife, just watch the other people, and follow them. If you still have no idea of what to do, ask the person next to you.

If you like the food, say so. Of course, you’ll thank them for the meal and for their kindness. It’s also a good idea to send a thank you card the day after.

Rose

Which of the following is NOT proper for joining in a dinner party（）

A．Get there 15 minutes earlier.

B．Make yourself at home.

C．Follow others to use forks and knives.

D．Thank your friends for the meal.