皮皮学，免费搜题
登录
搜题
【单选题】
谷氨酸经脱羧反应生成的物质是A.
组织胺
B.
5-羟色胺
C.
r-氨基丁酸
D.
多胺
E.
牛磺酸
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】在平面直角坐标系xOy中，点P的坐标为（-1，1），若取原点O为极点，x轴正半轴为极轴，建立极坐标系，则在下列选项中，不是点P极坐标的是（ ）
A.
（ ）
B.
（ ）
C.
（ ）
D.
（ ）
【单选题】在平面直角坐标系xOy中，点P的坐标为（-1，1），若取原点O为极点，x轴正半轴为极轴，建立极坐标系，则在下列选项中，不是点P极坐标的是（ ）
A.
（ 2 ， 3π 4 ）
B.
（ 2 ，- 5π 4 ）
C.
（ 2 ， 11π 4 ）
D.
（ 2 ，- π 4 ）
【单选题】Our teacher lives in the house ____ door faces to the north.
A.
which
B.
his
C.
that
D.
whose
【单选题】When is Black Friday?
A.
One day after Thanksgiving.
B.
Two days after Thanksgiving
C.
Three days after Thanksgiving.
D.
Four days after Thanksgiving
【简答题】When is Black Friday of 2020?写法同上
【简答题】Black Friday Black Friday is the Friday following Thanksgiving in the U.S. On this day, the Christmas shopping season begins and large stores all over the US have sales. Recently, Black Friday has bee...
【单选题】-- Our English teacher tells us that ______ grammar is a good way to learn English. --And our teacher says _____ also helpful to sing English songs.
A.
study, that was
B.
is studying, it’s
C.
studying, it’s
D.
studied, that was
【简答题】Black Friday Black Friday is the Friday following Thanksgiving in the US. On this day,the Christmas shopping season begins and large stores all over the US have sales. Recently,Black Friday has been t...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
