皮皮学,免费搜题
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【单选题】
雌激素的生理功能不正确的是
A.
促进女性生殖器官的形成和发育
B.
诱导女性第二性征的出现,并与孕激素协同形成月经周期
C.
促进肝脏合成多种转运蛋白
D.
降低血浆胆固醇,促进 HDL 的生成
E.
促进的排泄
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【简答题】比较 四氯汞钾溶液吸收-盐酸副玫瑰苯胺分光光度法 与 甲醛缓冲溶液吸收-盐酸副玫瑰苯胺分光光度法 测定SO2的异同点?
【单选题】听力原文:I just had a visit to the new art museum. Isn't that outstanding? I think people should go there to appreciate those marvelous artworks. (28)
A.
Isn't he standing outside the museum?
B.
The art museum isn't new.
C.
Is the museum still standing?
D.
The new museum is excellent.
【单选题】用四氯汞钾吸收液—盐酸副玫瑰苯胺法测定环境空气中SO 2 时,温度对显色有影响。温度越高,空白值(    ),褪色越快。
A.
不变    
B.
越低    
C.
越高    
D.
无规律变化
【多选题】四氯汞钾吸收液-盐酸副玫瑰苯胺法测定环境空气中 时,关键的实验因素有( )
A.
显色温度
B.
显色时间
C.
样品体积
D.
温度和大气压
【单选题】—Is there a museum near here? —Yes, ________. It's on Center Street. [     ]
A.
it is
B.
there isn't
C.
I don't know
D.
there is
【单选题】It s the first time that she has been to the museum ,______?
A.
isn't it
B.
hasn't it
C.
isn't she
D.
hasn't she
【简答题】—The museum isn’t far from here. Why not go there by _______? —OK. And it’s good for our health. A                    B                  C                   D
【多选题】四氯汞钾吸收液—盐酸副玫瑰苯胺法测定环境空气中的二氧化硫时,关键的实验因素有()。
A.
显色温度
B.
显色时间
C.
样品体积
D.
温度和大气压
【多选题】用四氯汞钾吸收液-盐酸副玫瑰苯胺法测定环境空气中SO2时,关键的实验因素有()。
A.
显色温度
B.
显色时间
C.
样品体积
D.
温度和大气压
【单选题】机动车仪表板上(如图所示)亮表示()
A.
驻车制动解除
B.
制动踏板没回位
C.
行车制动器失效
D.
制动系统出现异常
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