皮皮学,免费搜题
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搜题
【单选题】
病人是唯一传染源的疾病是()
A.
麻疹、水痘
B.
结核、钩虫病
C.
百日咳、流行性乙型脑炎
D.
伤寒、白喉
E.
流感、麻疹
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【单选题】在蛋白质一级结构分析中,测定肽片断氨基酸序列的最佳方法是()
A.
Sanger试剂法
B.
Edman降解法
C.
ddNTP法
D.
蛋白酶法
【判断题】压力容器的工作压力应不得大于该容器的设计压力或最高允许工作压力。判断对错
A.
正确
B.
错误
【单选题】Edman 降解法可用来测定氨基酸序列,所用的化学试剂是( )
A.
丹磺酰氯
B.
苯异硫氰酸酯
C.
三氯乙酸
D.
2,4二硝基氟苯
【单选题】"When designs so big, the traditional manufacturer will have new products to make,..." (Para. 9)
A.
The traditional manufacturer will start to make things designed by the makers if their creations become popular.
B.
The traditional manufacturer will design new products to compete with the makers whose designs are successful.
【单选题】压力容器的设计压力、最高工作压力、最大允许工作压力所用的压力是指()。
A.
表压力
B.
绝对压力
C.
标准大气压
【单选题】Nowadays people are working on designs of new buildings that are climate- friendly.
A.
Y
B.
N
C.
NG
【单选题】Edman 降解法测定氨基酸序列的试剂是 ( )
A.
DNP
B.
DNS
C.
PITC
D.
CNBr
【单选题】What is being clone to make T-shirts more attractive?
A.
New designs are being adopted.
B.
New technology is being employed.
C.
More artificial materials are being introduced.
D.
Advertisements are being widely used.
【单选题】Edman降解法测定氨基酸序列的试剂是( )
A.
DNFB
B.
DNS-Cl
C.
PITC
D.
HNO2
【单选题】在本量利分析的利润图上,当产品销售量小于保本量时,下列表述正确的是
A.
利润线位于横轴的上方
B.
企业处于盈利状态
C.
利润为0
D.
企业处于亏损状态
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