粒细胞是机体最重要的一类防御细胞，它的黏附作用是指（）

A、The two countries are so bitterly divided that the two political parties are literally accusing each other of treason

B、The two parties are of bing an enemy of the state

C、The two parties are of trying to undermine the security and the welfare of their own country

D、The gap between the rich and poor is not that big as it's ever been

A、O2、Li2

B、C2、N2

C、B2、O2

D、C2、F2

Task 2 Read the following paragraph. Underline the topic sentences in each paragraph and cross out any sentences that do not belong to the paragraph. There may be one or more irrelevant sentences.（30%，每个答案7.5%） 1. One of the most important men in our society is the garbage man. Each year more and more garbage is produced, and more men are required to dispose of it. These men do this “dirty work” despite the danger of being disabled or killed by the blades of the disposal trucks. If more people realized how important the garbage man’s job is, perhaps his working conditions would be improved. My brother used to work on a garbage truck. He quit because the job was too dangerous. Topic sentence:______________________________________________________________ Irrelevant sentences: ________________________________________________________ 2. His goal in life is to be excellent potter. He works all day forming graceful vases, bowls, and pitchers out of clay. He spends the rest of his time glazing and baking these pots so that they will be beautiful and durable. His girl friend makes silver jewelry. She is very talented, too. His teachers say that if he continues working at this rate, he will realize his goal very soon. Topic sentence:______________________________________________________________ Irrelevant sentences: ________________________________________________________

A、Two years

B、Three years

C、Fours years

D、Five years

A、21

B、25

C、27

D、29

A、

B、

C、

D、