病床数为400张的医院感染发病率应低于（） A.1% B.4% C.7% D.8%

下列做法能使我们更健康、更完美的走好青春之路的是[ ]

A、每天情绪紧张，患得患失

B、设计好自己的青春之路，规划美好的人生目标

C、穿着打扮与众不同

D、走自己的路，让别人去说吧

When you hear Westerners（西方人）say “ Drop in anytime”（随时来玩）or “Come and see me soon” , you should realize that it doesn’t mean you are welcome to come over to their house anytime. It’s wise to telephone before visiting someone.

Never accept an invitation unless you really plan to go. You may refuse by saying, “Thank you for inviting me, but I may not be able to come.” If you are unable to come after accepting the invitation, be sure to tell those who invite you in advance（提前）that you will not be there.

When you have accepted the invitation to a party or a dinner, it is polite to bring small gifts with you, such as bottles of drink, flowers and chocolate. Sometimes Westerners may take you out to dinner in a restaurant and it does not necessarily mean that he is going to pay the bill at the end of the meal. He might want you to “go Dutch”, which means each person pays his own bill.

小题1:The best title of this passage is ________

A．Drop in anytime.

B．Come and see me soon.

C．Invitation in western countries.

D．Westerners.小题2:When Westerners say “ Drop in anytime” or “Come and see me soon” , it means ________

A．you are welcome to visit them anytime

B．you are welcome to visit them, but you still need to call them before going to their house.

C．they don’t want you to visit them.

D．they will hold a party for you.小题3:If a westerner invites you to go to his house, ________

A．you may refuse if you don’t plan to go.

B．you have to accept the invitation even you don’t want to go.

C．you can’t accept the invitation.

D．and you accept the invitation, you must go.小题4: If you have accepted the invitation to a party or a dinner, what kind of gifts will you bring? ________

A．Money.

B．Televisions

C．Computers.

D．Books小题5:The underlined part “go Dutch” means “________” in Chinese.

A．去荷兰

B．去Dutch这家餐厅

C．实行 AA制

D．请客

按照《全国统一建筑工程预算工程量计算规则》的规定，当墙与基础使用不同的材料时，基础与墙的分界线根据（）确定。

A.设计室内地坪标高

B.设计室外地坪标高

C.材料的分界线

D.材料分界线位于室内地坪的位置

下表为元素周期表的一部分，请参照元素①－⑨在表中的位置，用化学用语回答下列问题：

（2）②⑦⑨的最高价含氧酸的酸性由强到弱的顺序为________________________。

（3）①、④、⑤中的某些元素可形成既含离子键又含共价键的化合物，写出其中两种化合物的电子式：           ___、                。

（4）元素④的一种氢化物A在一定条件下分解为它的另一种氢化物B,写出A的结构式_______                。

（5）由①④⑤⑨四种元素组成的两种化合物之间可以发生反应，写出离子方程式                                             。

（6）由表中元素形成的常见物质X、Y、Z、M、N可发生以下反应：

X溶液与Y溶液反应的离子方程式为_____________________                

N→⑥的单质的化学方程式为_____________           _