皮皮学，免费搜题
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【多选题】
超速开车的危害有A.
转弯时离心力增大，易发生横向侧翻
B.
增大制动时的冲击力
C.
制动距离增大
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】He is a teacher. He has been a teacher _____ 1990 and he _____ by his students. [ ]
A.
in, is loved
B.
until, loves
C.
since, is loved
D.
for, has loved
【简答题】A teacher has a wide (vary) ______of duties.
【简答题】What if a child has poor chemistry with the teacher?
【单选题】My English teacher ______ my test.
A.
has not yet graded
B.
has not yet been graded
C.
is not yet to be graded
D.
is not yet graded
【单选题】A teacher's work is different from an actor's because the teacher has to ______.
A.
learn everything by heart
B.
know how to control his voice
C.
deal with unexpected situations
D.
use more facial expressions
【单选题】Only when __________________ permission _______________ allowed to enter the lab.
A.
a teacher has given; are the students
B.
has a teacher given; are the students.
C.
has a teacher given; the students are
D.
a teacher has given; the students are
【单选题】Every classroom has a teacher's desk ______ the classroom. It's for the teacher. [ ]
A.
in front of
B.
behind
C.
beside
D.
in the front of
【简答题】当电动机低于额定转速时应采用恒转速方式调速。( )
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