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【多选题】
下列描述不正确的是A.
目前毒性试验实际应用中以大鼠和小鼠为主。
B.
慢性实验的目的是确定外来化合物的毒性上限。
C.
pH接近中性的大部分化学毒物对于皮肤和眼的刺激之间有必然联系。
D.
所有化学毒物均适于做皮肤刺激试验。
E.
家兔常用于研究化合物的皮肤毒性，包括对黏膜的刺激。
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【单选题】Victoria does NOT agree that ______.
A.
small changes should be made on news reports to read easily
B.
writing for speech is similar to writing for newspaper
C.
before reading the news, announcer should absorb the news in advance
D.
announcer should overcome the feeling of panic when reading something difficult
【简答题】AT89S52 单片机复位时,堆栈指针SP中的内容为 ,程序指针PC中的内容为 。
【单选题】Reports of problems with any of the machinery on the assembly line should be forwarded ______ to the maintenance department.
A.
directly
B.
openly
C.
strongly
D.
importantly
【简答题】51单片机复位时,堆栈指针SP中的内容为 ,程序指针 PC中的内容为 。
【单选题】In preparing scientific reports of laboratory experiments, you should _____ your finds in logical order and clear language.
A.
write
B.
raise
C.
present
D.
rise
【单选题】We can distinguish those research reports from each other mainly through ______.
A.
their writing style. and length
B.
their aims and possible audiences
C.
their presented places and time
D.
their content and purposes
【简答题】AT89S51单片机复位时,堆栈指针SP中的内容为 ,程序指针PC中的内容为 。
【简答题】当AT89S52单片机复位时，堆栈指针SP中的内容为（ ）H
【简答题】It requires that your reports should be easy for users to understand.
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