皮皮学，免费搜题
登录
搜题
【单选题】
有关心动周期的叙述,错误的是A.
一般说的心缩期指心室收缩期
B.
心房和心室可以同时舒张,但只能依次收缩
C.
心动周期缩短,收缩期缩短尤为显著
D.
舒张期指心房和心室均处于舒张状态
E.
心房和心室每收缩和舒构成一个心动周期
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】He has no idea what the book is about. He ______________ it very carefully.
A.
shouldn’t have read
B.
can’t have read
C.
mustn’t have read
D.
wouldn’t have read
【单选题】He has no idea what the book is about, he _____ have read it very carefully.
A.
can’t
B.
mustn’t
C.
may not
D.
must
【单选题】He has no idea what the book is about. He ______________ it very carefully.
A.
shouldn’t have read
B.
can’t have read
C.
mustn’t have read
D.
wouldn’t have
【单选题】You must remember that in order to be successful, you must first explore your talents and get me know yourself so as to find out ______ your real interest lies. [ ]
A.
what
B.
where
C.
that
D.
which
【单选题】He has no idea what the book is about. He ______read the book.
A.
couldn’t
B.
couldn’t have
C.
mightn’t have
D.
shouldn’t have
【单选题】He has no idea what the book is about. He ______read the book.
A.
a. couldn’t
B.
b. couldn’t have
C.
c. mightn’t have
D.
d. shouldn’t have
相关题目：