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【简答题】
农业生产中磷素的利用有何特点?人类对磷循环有何影响?
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参考答案:
举一反三
【单选题】根据人的视觉暂留特性,连续的动画或视频,每秒的帧频应该达到
A.
10
B.
12
C.
24
D.
36
【简答题】(Unit 10 Task 2)(10)A: Let's propose a to our friendship, shall we? B: Cheers.A. toast
【单选题】He is the very lecturer,______ experience impressed us greatly at the conference yesterday. [     ]
A.
who
B.
whom
C.
which
D.
whose
【单选题】下列药品说明书和标签中,药品名称和标识符合规定的是( )。
A.
某药品的商品名字体以单字面积计等于通用名所用字体的二分之一
B.
某外用乳膏标签上采用蓝底白色字体的“外”字标识
C.
某药品的通用名字体采用深绿色,与背景形成强烈反差
D.
某药品的注册商标字体以单字面积计等于通用名所用的字体的三分之一
【单选题】What especially impressed us was the way_____the girl studied foreign languages. 
A.
不填
B.
which
C.
by which
D.
how
【单选题】Next door to ours ______, who has impressed us with his special talking style.
A.
where lives an old man
B.
where does an old man live
C.
lives an old man
D.
does an old man live
【单选题】All of us were impressed by her _______ complexioa
A.
fluffy
B.
floral
C.
florid
D.
fluid
【单选题】与调速阀相比较,节流阀的显著特点是 () ?
A.
调节范围大
B.
结构简单,成本低
C.
流量稳定性好
D.
最小压差的限制较小
【单选题】All of us were impressed by her ______ complexion.
A.
fluffy
B.
floral
C.
florid
D.
fluid
【单选题】某一个群体某一基因占其等位总数的相对比率叫做( )。
A.
基因频率
B.
基因型频率
C.
染色体频率
D.
姐妹染色单体频率
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