皮皮学，免费搜题
登录
搜题
【单选题】
设放大镜半径为 h ,它到人眼的距离为 P ,人眼瞳孔半径为 a ,要使通过放大镜看到的视场大些,则可采用的方法是:A.
增大 h ，减小 P
B.
增大 h ，增大 P
C.
减小 h ，减小 P
D.
减小 h ，增大 P
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Contrary to popular belief, taking a walk immediately after meals doesn’t _______ do good to our health.
A.
necessarily
B.
specially
C.
directly
D.
constantly
【单选题】确定正常人某项指标正常值范围时,调查对象是
A.
健康达到了要求的人
B.
排除了影响研究指标的疾病和因素的人
C.
只患过小病但不影响研究指标的人
D.
排除了患过某病或接触过某因素的人
【单选题】Experiments have shown that, contrary to our expectation, people tend to treat you the way you treat them.
A.
right
B.
Wrong
C.
Not mentioned
【单选题】She didn’t allow the accident to discourage her. On the contrary, she began to work .
A.
as twice hard
B.
twice as hard
C.
twice as harder
D.
harder twice
【单选题】---I’d thought you couldn’t deal with the situation. ---On the contrary, it is quite _______ my power. [ ]
A.
beyond
B.
within
C.
under
D.
over
【单选题】It’s wonderful to have a month in the faraway village, all worries and responsibilities.
A.
contrary to
B.
free from
C.
far away
D.
far from
相关题目：