皮皮学，免费搜题
登录
搜题
【单选题】
Rous于下面哪一年发现了引起鸡的恶性肿瘤的劳斯肉瘤病毒?()A.
1910年
B.
1911年
C.
1912年
D.
1913年
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
【多选题】下列叙述正确的是
A.
共轭效应使红外吸收峰向低波数方向移动
B.
诱导效应使红外吸收峰向高波数方向移动
C.
氢键使红外吸收峰向低波数方向移动
D.
氢键使红外吸收峰向高波数方向移动
E.
共轭效应使红外吸收峰向高波数方向移动
【单选题】–This is the first time I _____ pictures with you . –Now it is time that you ______ a picture for me .
A.
took , took
B.
have taken , took
C.
took , have taken
D.
has taken , take
【单选题】--This is the first time I ____ pictures with my own camera. --It’s time that you ___ a picture of me.
A.
took; took
B.
took; will take
C.
have taken; took
D.
will take; have taken
【单选题】She gives me a big smile __________ she sees me.
A.
a first time
B.
some time
C.
every time
D.
from time to time
【简答题】Please show me _______to send an e-mail, John．It's the first time for me to do it.
【简答题】为了满足学生的需要,学校应当做一些适时的调整。 (to meet one's need)
相关题目：