皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【判断题】
如果我们把这三节课所有的植物类型与出现、繁盛的时段列在一起,就可以看到植物演化的主要脉络。我们经常把前寒武纪到志留纪称之为菌藻植物时代,泥盆纪称为蕨类植物时代,石炭二叠纪称之为裸子植物时代,中生代称为裸蕨植物时代而新生代为被子植物时代,这就是最简略的植物演化史。
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
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【简答题】You must solve the problem (当场)
【单选题】三相异步电动机用交流接触器实现长动控制中,若按下起动按钮电动机运行,松开则电机停转,其故障的原因是( )
A.
接触器辅助动合触点因故障不动作;
B.
交流接触器通电后衔铁不吸合;
C.
按钮失灵;
【单选题】若不幸被狗咬伤,在送医院救治前,最好用下面的何种液体清洗伤口?
A.
酒精
B.
肥皂水
C.
浓盐水
D.
苏打水
【单选题】Not only you and I but Peter, the top student in our grade, ______ not able to solve the problem.
A.
are
B.
were
C.
am
D.
is
【单选题】当反应速率常数 k 的单位为( L · mol -1 ) 1/2 · S -1 时 , 该反应的反应级数是
A.
1.5
B.
1
C.
0.5
D.
2
【简答题】consideration contemporary criterion distribute evaluation extent indicate perceive rational secondary significant in terms of prior to rely on tend to 1. It’s a mistake to think of Florida only _____...
【单选题】If you pay for the computer in cash, you could have a 5% discount; _______ we can deliver it to you for free.
A.
in demand
B.
in addition
C.
in return
D.
in place
【单选题】When paying at the bar, you may wish to pay in cash or with a credit card. Which of these sentences are you not likely to hear the barperson say?
A.
Would you like to pay by cash or card?
B.
Would you like to pay by cash or credit?
C.
Would you like to pay in cash or use a credit card?
D.
Would you like to pay with cash or plastic?
【单选题】若不幸被狗咬伤,在送医院救治前,最好用下面的何种液体清洗伤口?
A.
肥皂水
B.
酒精
C.
浓盐水
【单选题】当反应速率的单位为mol-1·L·s-1时,反应级数为
A.
一级
B.
二级
C.
零级
D.
三级
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题