下列关于藻类、苔藓、蕨类植物的叙述正确的是（ ） A．藻类植物不能进行光合作用

多普勒超声示心脏左室流出道内探及舒张期反流束（）

A.二尖瓣关闭不全

B.二尖瓣狭窄

C.主动脉瓣狭窄

D.主动脉瓣关闭不全

E.三尖瓣关闭不全

Read the following reviews for movies that are showing at the moment．And then answer questions．

Happiness（Romance）★★★★

Happiness tells the story of two people （Lisa Turbot and Danny Roy） who work for different advertising companies．They talk on the phone all the time and don't like each other．But then they correspond by email and fall in love．This movie will be very popular with teenagers and people who like romances．It also has beautiful music．

I Scream （Thriller）★★

In I Scream, Paul （Colin Jacks） is a young man who joins a thriller club．Each of the members tries to frighten the others．Paul is told to stay in an old house for the night．This movie is very frightening but also quite silly．It doesn't make sense for Paul to stay m the house when things start to go wrong．Only for people who like thrillers．

Paul's Heroes （Comedy）★★★

This is a very funny war movie set in World War Two．Six soldiers （including Sammy Turblow） have to get to Italy to take secret messages to the American army there．During the movie, they dress up as women and fight with Italian workers．You can guess the ending, but it's great fun getting there．

_____（Drama）★★★★

This is a very good drama with Jack Ross, who pays a hard-working truck driver．His wife becomes ill and he has to find a doctor who can help her．m his travels he meets Dr．Lloyd （Phil Driver） who has found the cure for the illness, but Jack Ross has only twelve hours to get the medicine back to his wife on the other side of America．This is an excellent movie, which is very exciting．

小题1:Which of the four movies is the least popular with people?

A．The 1st one.

B．The 2nd one.

C．The 3nd one.

D．The 4th one.小题2:The underlined word "correspond" can be replaced by _________.

A．date

B．exchange

C．write

D．communicate小题3:A thriller is most probably a film which tells something _________.

A．frightening

B．instructive

C．humorous

D．interesting小题4:Which of the following is the best title for the fourth film?

A．A Hard-working Truck Driver

B．Medicine

C．A Strange Illness

D．Twelve Hours

无线通信系统的发射机由（）和功率放大器等组成。

A、振荡器

B、放大器

C、调制器

D、变频器

下列属于Ⅱ型超敏反应性疾病的是（）。

A.血清病

B.接触性皮炎

C.新生儿溶血

D.类风湿关节炎

E.荨麻疹

以下哪一项是现代社会中的家庭观念中最为核心的因素：（）

A、环境因素

B、社会因素

C、法律因素

D、亲情因素