幽门螺杆菌与空肠弯曲菌相同的生化反应是（）。 A.氧化酶试验阳性 B.43℃生长 C

读短文，判断正(T)误(F)。

      I have a new English teacher. Her name is Mary Black. She's from Canada. She is young and pretty. Her

eyes are blue and her hair is yellow. She is active. She likes singing and dancing. She tells us stories (故事) and

teaches (教) us English songs. Her class is so much fun. She is strict, but she is very kind. We all like her.

( ) 1. We can call our new English teacher Miss Mary.

( ) 2. My English teacher is quiet.

( ) 3. My English teacher likes singing.

( ) 4. My English teacher is a Chinese lady.

( ) 5. Mary Black can tell stories.

种子萌发时，最先伸长突破种皮的是胚根…______．

设P(A)=1/2，P(B)=1/3，且A包含B，则P(A-B)=（）。

A．1/6

B．1/3

C．1/2

D．5/6

读图，回答下面2题。 

小题1:关于对图中的叙述，正确的是（   ）

A．甲岛风蚀地貌发育

B．甲岛地热资源丰富

C．乙岛所在大洲有五大淡水湖群

D．P处是乙岛建军港的最佳地点小题2:一艘旅游船从甲岛出发，到乙岛，选择最合理的路线航行，下列叙述正确的是（   ）

A．过运河时，航向大致由西北向东南

B．逆流航行时所遇洋流都为风海流

C．所经海域水温越来越高

D．所经海区盐度不断升高

如图所示，一个称为“千人震”的趣味物理小实验所用器材是一节电动势为1.5V的新干电池、几根导线、开关和一个用于日光灯上的镇流器，几位同学手拉手连成一排，另一位同学将电池、镇流器、开关用导线连接起来，并将它们和首、尾两位同学两只空着的手相连，在开关______（填“闭合”或“断开”）时就会使连成一排的同学都有触电的感觉，该实验的原理是______．