有关农业专家经研究发现，许多农作物之间存在相生相克的关系，如花生、大豆地内种玉米

Last Sunday my father and I went fishing along a river. We found the water very dirty that we could hardly catch any fish in it. A lot of factories along the river always poured their waste water and rubbish straightly into the river, which made the river polluting. In this way most of the fish in the river was killed. Unless the rivers all over the country are polluted like this, no living things will be exist in the water. As we all know, environmental pollution do great harm to living things. Now more and more people have realized what serious this problem is. Our government is doing her best to take measure to fight against pollution. We expect that water in every river will be made cleaner and cleaner before long.

某大学军训，军训部将学员编成8个小组，如果每组人数比预定人数多1人，那么学员总数将超过100人；如果每组人数比预定人数少1人，那么学员总数将不到90人，由此可知，预定的每组学员人数是（ ）

A．20人

B．l8人

C．16人

D．12人

男性，56岁，急性脑栓塞，使用链激酶溶栓治疗，现引起出血，应选用的对抗药是

A．鱼精蛋白
B．维生素K
C．Ca²⁺
D．对羧基苄胺
E．维生素C

参加细胞免疫最主要的细胞是（）

A.巨噬细胞

B.B细胞

C.T细胞

D.肥大细胞

E.浆细胞

若有char s[3][3]="AAA","BBB","CCC";说明语句，则与它等价的语句是（）。

A．char **s="AAA","BBB","CCC";

B．char *s[3]="AAA","BBB","CCC";

C．char s[][5]="AAA","BBB","CCC";

D．char s[][3]="AAA","BBB","CCC";