问题 选择题

秦岭-淮河一线大致是(  )

A.热带与亚热带的分界线

B.亚热带与暖温带的分界线

C.暖温带与中温带的分界线

D.中温带与寒温带的分界线

答案

秦岭、淮河一线是我国东部地区重要的地理界线,在它的南北两侧,自然环境、地理景观和居民的生产生活习惯有明显的差异.秦岭、淮河主要是:四大区域中,南方与北方地区的分界线;一月份0℃等温线通过的地方;800mm等降水线通过的地方;温度带中,暖温带与亚热带分界线;干湿地区中,湿润区与半湿润区分界线;温带季风气候与亚热带季风气候分界线;长江流域与黄河流域分界线;水田与旱地的分界线;河流有冰期与无冰期的分界线;两年三熟与一年两熟的分界线;水稻、小麦杂粮的分界线;亚热带常绿阔叶林与温带落叶阔叶林的分界线等;可见符合条件的是亚热带和暖温带的界线.

故选:B.

选择题
阅读理解

The Brown Bear

My wife Laura and I were on the beach, with three of our children, taking pictures of shore birds near our home in Alaska when we spotted a bear. The bear was thin and small, moving aimlessly.

Just a few minutes later, I heard my daughter shouting, “Dad! The bear is right behind us!” An agreesive bear will usually rush forward to frighten away its enemy but would suddenly stop at the last minute. This one was silent and its ears pinned back---- the sign (迹象) of an animal that is going in for the kill. And it was a cold April day. The bear behaved abnormally, probably because of hunger.

I held my camera tripod (三脚架) in both hands to form a barrier as the bear rushed into me. Its huge head was level with my chest and shoulders, and the tripod stuck across its mouth. It bit down and I found myself supporting its weight. I knew I would not be able to hold it for long.

Even so, this was a fight I had to win: I was all that stood between the bear and my family, who would stand little chance of running faster than a brown bear.

The bear hit at the camera, cutting it off the tripod. I raised my left arm to protect my face; the beast held tightly on the tripod and pressed it into my side. My arm could not move, and I sensed that my bones were going to break.

Drawing back my free hand, I struck the bear as hard as I could for five to six times. The bear opened its mouth and I grasped its fur, trying to push it away. I was actually wrestling (扭打) with the bear at this point. Then, as suddenly as it had begun, the fight ended. The bear moved back toward the forest, before returning for another attack----- The first time I felf panic.

Apparently satisfied that we caused no further threat, the bear moved off, destroying a fence as it went. My arm was injured, but the outcome for us could hardly have been better. I’m proud that my family reminded clear-headed when panic could have led to a very different outcome.

小题1:The brown bear approached the family in order to _______.

A.catch shore birds

B.start an attack

C.protect the children

D.set up a barrier for itself小题2:The bear finally went away after it _______.

A.felt safe

B.got injured

C.found some food

D.took away the camera小题3:The writer and his family survived mainly due to their ______ .

A.pride

B.patience

C.calmness

D.cautiousness