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【单选题】
下列关于酶的叙述中,不正确的是A.
酶的催化效率很高
B.
酶的催化效率不受外界条件的影响
C.
酶在反应过程中本身不发生变化
D.
一种酶只能催化一种物质或一类物质的化学反应
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举一反三
【简答题】Many parents monitor instant messaging, either by limiting time online or by keeping the computer in a common area.
【单选题】In the reform of the Church Henry VIII dissolved all of England's monasteries and nunneries because they were much more loyal to _________then to their English kings.
A.
the Pope
B.
Jesus Christ
C.
Roman Catholic
D.
the bishops
【简答题】If your child has mobile internet access, it will be more difficult to monitor(监督) and control his or her internet use. Kids are turning to the internet for everything from hanging out with friends to...
【单选题】Many advertisers defend the targeting of children because.
A.
it is up to parents to monitor their children
B.
children understand what an advertisement is trying to do
C.
children are provided a game in return for the information
D.
no actual sales take place
【简答题】If you go to Egypt, you'll see a lot of pyramids . The biggest of all is the Great Pyramid; it is about 137 meters high and made of 2,300,000 big stones. Each stone weighs about two and a half tons .T...
【单选题】Many advertisers defend the targeting of children because ______.
A.
no actual sales take place
B.
it is up to parents to monitor their children
C.
children understand what an advertisement is trying to do
D.
children are provided a game in return for the information
【简答题】Kings of Chakri Dynasty all have Chinese names, to show their subordination to the ____________ Empire.
【单选题】同学们在参加劳动时，累得满脸通红，大汗淋漓，这体现了皮肤具有 [ ]
A.
感受刺激和排泄的功能
B.
降低体温和保护的功能
C.
调节体温和排泄的功能
D.
感受刺激和保护的功能
【简答题】Many parents monitor instant messaging, either by limiting time online or by keeping the computer in a common area.
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