问题 选择题

通常食用下列食品不会对人体健康造成危害的是(  )

A.发霉的面包

B.蛋白质含量几乎为零的“婴儿奶粉”

C.甲醛浸泡的食品

D.牛奶经过发酵后得到的酸奶

答案

A、霉变的面包产生了黄曲霉素,黄曲霉素有毒,不能食用,故A错误,

B、蛋白质含量几乎为零的“婴儿奶粉”,造成蛋白质补充不足,会影响婴儿的生长发育,故B错误,

C、甲醛有毒,能破坏蛋白质的结构,不但对人体有害,而且降低了食品的质量,故C错误,

D、酸奶是以新鲜的牛奶为原料,经过巴氏杀菌后再向牛奶中添加有益菌发酵制成,酸奶不但保留了牛奶的所有优点,而且经加工过程还扬长避短,成为更加适合于人类的营养保健品,故D正确,

故选D.

单项选择题
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MELBOURNE, Australia – A kangaroo frightened by a man walking his dog attacked the pair, throwing the pet underwater and hitting the owner in the stomach with its back legs. The Australian, Chris Rickard, was in stable condition Monday after the attack, which ended when the 49-year-old struck the kangaroo in the throat.

Rickard said he was walking his blue dog, Rocky, on Sunday morning when they surprised a sleeping kangaroo in Arthur's Creek northeast of Melbourne. The dog chased the animal into a pond, when the kangaroo turned and knocked the pet underwater.

When Rickard tried to pull his dog free, the kangaroo turned on him, attacking with its back legs and tearing a deep cut into his stomach and across his face.

"I thought I might take action to drag the dog out from under his grasp, but I didn't expect him to actually attack me," Rickard, 49, told The Herald Sun newspaper. "It was a shock at the start because it was a kangaroo, about 5 feet high, they don't go around killing people."

"I was stuck having to hold on to the dog with both hands because it was half drowned and I couldn't really see anything because the kangaroo just attacked me.”

He added, "All I could do was just keep pushing for the bank and he was trying to push me under the water, so at that point I struck him in the throat and that made him back off a little bit.

"I don't think I'll ever be able to watch kangaroo programs quite the same as I used to — it might bring back a couple of bad memories.”

Kangaroos rarely attack people but will fight if they feel threatened.

Dogs often chase kangaroos, which have been known to lead the pets into water and defend themselves there.

Rickard said he ended the attack by hitting the kangaroo in the throat adding Rocky was "half-drowned" when he pulled him from the water.

小题1:Rickard and his pet dog were attacked when _________.

A.he was teasing a kangaroo

B.he was walking his dog

C.swimming in the pond

D.dragging his dog out from water小题2:In Australia, kangaroos ________.

A.are only seen in zoos

B.frequently attack people and pets

C.get along rather peacefully with people

D.can be found swimming in ponds小题3:The kangaroo attacked the man and his dog probably because ________.

A.the man struck it in the throat

B.the dog chased it

C.the man wanted to drown it

D.it wanted to drown the dog小题4:As a result of the attack, ________.

A.the dog was drowned dead

B.the kangaroo was killed

C.kangaroos should be under stricter protection

D.Rickard was left a deep impression