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【判断题】
补体最主要的活性是溶细胞作用，溶血程度与补体量成正相关,一般以50%溶血作为检测终点。A.
正确
B.
错误
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举一反三
【单选题】（高中）下列哪个选项是空缺处的最佳答案？ --Sam speaks _________ English like a native. I always admire him. --Now he is learning _________ more difficult language ---Arabic.
A.
an； a
B.
/； the
C.
/； a
D.
the； a
【简答题】Bob and San are my classmates. Bob is as 78.________(tall)as Sam, and they 79.________([bəʊθ])have short hair. But Bob is a little 80._________(thin)than Sam. Bob is more 81.________(外向的)and friendlie...
【多选题】关于坐标方位角的说法正确的是（ ）。
A.
由坐标纵轴的北端起，逆时针方向量到直线的水平角度
B.
角值范围为 0° ～ 360°
C.
正、反坐标方位角刚好相差 180°
D.
由坐标反算得到的象限角就是方位角
【简答题】Laura: Luis speaks Spanish.Jiao: Oh, really? Laura: Yes, he ________________ three languages - Spanish, English, and Portuguese.2. Chris: Does Maggie have any brothers or sisters?Emi: Yes, she _______...
【简答题】阅读短文，判断句子正误，对的打“√”，错的打“×'。 This is my classroom. It's bright and clean. But it is small. There are twenty-three desks and chairs in it . They are new. You can see two girls and a boy in it. The boy is...
【单选题】--Sam speaks _________ English like a native. I always admire him. --Now he is learning _________ more difficult language ---Arabic.
A.
． an a
B.
． / the
C.
． / a
D.
． the a
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