对一个人有一般意义的倾向的特质是（）。 A.表面特质 B.根源特质 C.枢纽特质 D

化脓性脑膜炎的主要传播途径是（）

A.昆虫传播

B.接触传播

C.血液传播

D.呼吸道传播

E.粪便传播

语法填空。

     My name is Wang Kun. Since middle school, my sister and I 1_____ (dream) about 2_____ (take) a great

bike trip. When we graduated from college, we finally got the chance to do it. It 3_____ my sister 4_____ first

had the idea to cycle along 5_____ Mekong River from 6____ it begins to where it ends. The Dai live near the

Lancang River, the Chinese part of the river that 7_____ (call) the Mekong River in other countries. Wang Wei

soon got them interested in cycling too. She insisted that we 8_____ (find) the source of the river. She gave

me a 9_____ (determine) look. Once She has made up her mind, nothing can change it. Finally, I had to give

10_____.

“荷花杯舞蹈大赛”每几年一届（）

A、2.0

B、4.0

C、6.0

D、8.0

多股导线采用插接时，接头处电阻应大于等长导线的电阻。

利用图所示的实验装置进行与光合作用有关的实验，正确的是（）

A.在光下，试管中收集的气体量代表了光合作用产生的氧气量

B.在光下，如果有气泡产生，可以说明光合作用产生氧气

C.为了探究二氧化碳浓度对光合作用的影响，可以用不同浓度碳酸氢钠溶液进行实验

D.为了探究光照强度对光合作用的影响，用一套装置慢慢向光源靠近，观察气泡产生的速率的变化