皮皮学，免费搜题
登录
搜题
【判断题】
ISO的感光度是对光的灵敏度的指数。感光度越高，对光线越不敏感。A.
正确
B.
错误
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】No one likes to eat with a dirty knife, fork, or spoon. It is important to completely wash all utensils before using them. Clean utensils won’t transmit germs and bacteria. They also are more pleasant...
A.
No one likes to eat with a dirty knife, fork, or spoon.
B.
It is important to completely wash all utensils before using them.
C.
Clean utensils won’t transmit germs and bacteria.
D.
They also are more pleasant to eat with.
【单选题】将 18.6g 某非电解质溶于 250g 水中,溶液凝固点为 -0.744 ̊C ,则该溶质的相对分子量为( )
A.
186
B.
93.0
C.
298
D.
46.5
【单选题】What kind of spoon is often used to eat desserts?
A.
Soup spoon
B.
Tea spoon
C.
Dessert spoon
D.
Salad spoon
【单选题】将450 g某非电解质溶于40.0 g水中,测得该溶液凝固点为- 0.150°C。已知水的K f = 1.86 K·kg·mol -1 ,该非电解质的相对分子质量为:( )
A.
140
B.
83.2
C.
186
D.
204
【单选题】将 18.6 克某非电解质溶于 250 克水中,若溶液的凝固点降低了 0.744 ° C ,则该溶质的 分子量为( )。
A.
186
B.
93.0
C.
298
D.
46.5
【单选题】______he was tired,______he didn’t stop______.
A.
Although ; but; to rest
B.
/; but; to work
C.
Although;/; rest
D.
Although;/; working
【单选题】________ he is ill, ________he goes to school.
A.
Although; but
B.
/; /
C.
Although; /
【单选题】将0.45g某非电解质溶于30g水中，溶液凝固点为－0.15℃。已知水的Kf= 1.86 K·kg·mol－1，则该非电解质的摩尔质量(g·mol－1)约为（ ）。
A.
100
B.
83.2
C.
186
D.
204
【单选题】___________he is poor,________he is happy.
A.
Although;/
B.
Although; but
C.
But; although
D.
/; /
相关题目：
参考解析：
知识点：
题目纠错 0
发布
