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【单选题】
苯甲基磺酰氟 (PMSF) 可通过共价结合于丝氨酸蛋白酶的活性中心的催化基团 Ser 残基,从而使得丝氨酸蛋白酶失活,这种酶和抑制剂的结合无法通过物理方法分开。这属于何种抑制作用?
A.
不可逆抑制
B.
竞争性抑制
C.
非竞争性抑制
D.
反竞争性抑制
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举一反三
【单选题】根据《行政诉讼法》的规定，下列各项中，当事人可以提起行政诉讼的案件是（ ）。
A.
对国家财政部发布的新会计法规不服
B.
对行政机关的罚款决定不服
C.
对行政机关对行政机关工作人员的处罚决定不服
D.
国防、外交等国家行为
查看完整题目与答案
【单选题】They said that they ______ a wonderful time in Beijing and they hoped to be there again.
A.
had
B.
would have
C.
would have had
D.
could have
查看完整题目与答案
【判断题】《旅行社条例》规定，旅行社取得经营许可满两年，且未因侵害旅游者合法权益受到行政处罚的，可以申请经营出境旅游业务。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Cultural Puzzle Read the following situation and choose the appropriate answer(s). There may be more than one possible answer. Situation: An American invited a group of Japanese students over to his h...
A.
The Americans must have done something that offended the Japanese.
B.
The Japanese were not having a good time.
C.
Japanese usually leave as a group and try not to stay too long so as not to offend their host.
查看完整题目与答案
【多选题】下面有关系统维护的叙述中不准确的有哪些（）
A.
要维护一个系统，必须首先理解这个系统
B.
阅读别人写的程序并不困难
C.
如果文档不齐全也可以维护一个系统
D.
谁编写的系统软件就应由谁来维护这个系统系件
E.
设计系统时就应考虑到将来的可修改性
F.
系统维护是一件很吸引人的创造性工作
G.
维护系统就是改造系统中的错误
H.
维护好一个系统是一件很困难的事
查看完整题目与答案
【判断题】The couple often quarreled with each other. ( ) 2. The couple hoped that the therapist could help them improve their relationship.( ) 3. The problem with the couple was that they didn’t want to li...
A.
正确
B.
错误
查看完整题目与答案
【简答题】Read the following situation and choose the appropriate answer(s). There may be more than one possible answer. Situation: An American invited a group of Japanese students over to his house. He and his...
查看完整题目与答案
【判断题】软件维护是一件很吸引人的创造性工作。
A.
正确
B.
错误
查看完整题目与答案
【判断题】《旅行社条例》规定,旅行社取得经营许可满两年,且未因侵害旅游者合法权益受到行政处罚的,可以申请经营出境旅游业务。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Read the fllowing situation and choose t he appropriate answer(s). There may be more than one possible answer. Situation: American invited a group of Japanese students over to his house. He and his wi...
A.
The Americans must have done something that offended the Japanese.
B.
The Japanese were not having a good time.
C.
Japanese usually leave as a group and try not to stay too long so as not to offend their host.
查看完整题目与答案
相关题目：
【单选题】根据《行政诉讼法》的规定，下列各项中，当事人可以提起行政诉讼的案件是（ ）。
A.
对国家财政部发布的新会计法规不服
B.
对行政机关的罚款决定不服
C.
对行政机关对行政机关工作人员的处罚决定不服
D.
国防、外交等国家行为
查看完整题目与答案
【单选题】They said that they ______ a wonderful time in Beijing and they hoped to be there again.
A.
had
B.
would have
C.
would have had
D.
could have
查看完整题目与答案
【判断题】《旅行社条例》规定，旅行社取得经营许可满两年，且未因侵害旅游者合法权益受到行政处罚的，可以申请经营出境旅游业务。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Cultural Puzzle Read the following situation and choose the appropriate answer(s). There may be more than one possible answer. Situation: An American invited a group of Japanese students over to his h...
A.
The Americans must have done something that offended the Japanese.
B.
The Japanese were not having a good time.
C.
Japanese usually leave as a group and try not to stay too long so as not to offend their host.
查看完整题目与答案
【多选题】下面有关系统维护的叙述中不准确的有哪些（）
A.
要维护一个系统，必须首先理解这个系统
B.
阅读别人写的程序并不困难
C.
如果文档不齐全也可以维护一个系统
D.
谁编写的系统软件就应由谁来维护这个系统系件
E.
设计系统时就应考虑到将来的可修改性
F.
系统维护是一件很吸引人的创造性工作
G.
维护系统就是改造系统中的错误
H.
维护好一个系统是一件很困难的事
查看完整题目与答案
【判断题】The couple often quarreled with each other. ( ) 2. The couple hoped that the therapist could help them improve their relationship.( ) 3. The problem with the couple was that they didn’t want to li...
A.
正确
B.
错误
查看完整题目与答案
【简答题】Read the following situation and choose the appropriate answer(s). There may be more than one possible answer. Situation: An American invited a group of Japanese students over to his house. He and his...
查看完整题目与答案
【判断题】软件维护是一件很吸引人的创造性工作。
A.
正确
B.
错误
查看完整题目与答案
【判断题】《旅行社条例》规定,旅行社取得经营许可满两年,且未因侵害旅游者合法权益受到行政处罚的,可以申请经营出境旅游业务。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Read the fllowing situation and choose t he appropriate answer(s). There may be more than one possible answer. Situation: American invited a group of Japanese students over to his house. He and his wi...
A.
The Americans must have done something that offended the Japanese.
B.
The Japanese were not having a good time.
C.
Japanese usually leave as a group and try not to stay too long so as not to offend their host.
查看完整题目与答案