【单选题】反馈控制系统主要由()、比较器和控制器构成,利用输入与反馈两信号比较后的偏差作为控制信号来自动地纠正输出量与期望值之间的误差,是一种精确控制系统。
【单选题】If you have trouble ______ the poems, the notes on the margins will help you.
【判断题】用户创建了站点以后,就不能添加或删除站点中的网页。
【单选题】According to the passage, the Whitehead research has taken a big step in ______.
【单选题】CRH1的每辆M车和Tp车上配备( )大件行李存放架。
【单选题】Which of the following statements is true according to this passage?
A.
If everyone understands the common purpose, team objectives can be achieved.
B.
That each member emphasizes theirs strengths and minimizes their weakness enables the building of a team's objectives.
C.
Many leaders know how change their groups into productive teams, but they have not enough time.
D.
Feedbacks are not immediate, however, problems can be solved very quickly.
【单选题】—I have difficulty __________ the article. —Remember __________ it three times at least.
A.
to understanding, reading
B.
understanding, reading
C.
understanding, to read
D.
to understand, to read
【单选题】反馈控制系统主要由( )、比较器和控制器构成,利用输入与反馈两信号比较后的偏差作为控制信号来自动的纠正输出量与期望值之间的误差,是一种精确控制系统。
【单选题】______ is NOT mentioned as a reward for volunteer activities.
B.
Greater understanding of others
C.
Great understanding of oneself
D.
Opportunity to work in the community