用硫酸镁治疗重度子痫前期时，最早出现的中毒症状是（）。A.心率减慢 B.呼吸次数减少

农业是直接从野生动植物的选育、驯化、栽培、优化而逐渐发展起来的，与自然条件密切相关。完成各题。

小题1:下列关于农业区位的叙述，正确的是

A．随着科技的发展，气候因素将不会对农业产生影响

B．对农业自然条件的改造要充分考虑投入、产出比

C．我国黄河流域的自然条件非常适合于发展水稻种植业

D．现代农业生产中，农民主要考虑的是自然条件对农业生产的影响小题2:目前，农民调整农作物的品种和规模时主要考虑

A．气温和降水的变化

B．交通运输条件的变化

C．市场需求的变化

D．流动人口的变化

A man was on the side of the road hitchhiking（搭便车）on a very dark night in the middle of a terrible rainstorm, with no cars on the road．The storm was so strong that the man could hardly see a few feet ahead of him．Suddenly, he saw a car come towards him and stop．The man, without thinking about it, got in the car and closed the door and only then did he realize that there was nobody behind the steering wheel（方向盘）!

The car started to move very slowly．The man looked at the road and saw a curve （拐弯处）coming his way．Terrified, he started to pray, begging for his life．He had not come out of shock when, just before the car hit the curve, a hand suddenly appeared through the window and moved the wheel．The man, paralyzed with fear, watched how the hand appeared every time the car was drawing near a curve．Finally, although terrified, the man managed to open the door and jump out of the spooky car．Without looking back, the man ran through the storm all the way to the nearest town．In a state of complete horror, the man walked into a nearby bar and asked for two glasses of Scotch whisky．

Then, still shaking with fright, he started telling everybody in the bar about the horrible experience he just went through in the spooky car．Everyone in the bar listened in silence and became frightened, with hair standing on end, when they realized the man was telling the truth because he was crying and he was certainly not drunk!

About half an hour later, two other young men walked into the same bar and one said to the other, “Hey, there’s a stupid man who jumped into the car while we were pushing it!”

小题1:When the car was first drawing near a curve, the man ________．

A．felt very curious

B．was extremely frightened

C．cried for help

D．remained as calm as possible小题2:According to the passage, what made the man’s experience believable?

A．His reasonable behavior．

B．His vivid description．

C．His plain appearance．

D．His honest attitude．小题3:We can infer from the passage that ________．

A．it is unsafe for people to take a free ride

B．the man was telling a lie to his listeners

C．the car probably broke down on the way

D．the two young men were familiar with the man

选出下列句中属被动句的一项[     ]

A．此非曹孟德之困于周郎者乎？

B．苏子与客泛舟游于赤壁之下。

C．月出于东山之上，徘徊于斗牛之间

D．寄蜉蝣于天地，渺沧海之一粟。

课外活动的主体部分是( )。

A．科技活动
B．学科活动
C．体育活动
D．社会活动

鞣质是（）

A、多元酚类

B、复杂的化合物

C、具有涩味的化合物

D、大分子化合物

E、复杂的多元酚类、大分子化合物