皮皮学,免费搜题
登录
搜题
【多选题】
在矿井通风中,习惯上把进入采掘工作面等用风地点之前,空气成分或状态变化不大的风流叫做 [填空(1)] [填空(2)] ,简称
A.
污风
B.
污乏风
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【简答题】Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure (血压) and raise chances of recovering from a heart attack, reduce loneliness ...
【单选题】下列关于HDL的叙述哪一项是正确的( )
A.
由脂肪组织向肝脏转运游离脂酸
B.
由肠向肝转运吸收的脂肪
C.
由肝向肝外组织转运内源性合成的脂类
D.
由肝向肝外组织转运胆固醇以便细胞利用
E.
由肝外组织向肝脏转运胆固醇以便降解与排泄
【简答题】水土流失是形成黄土高原千沟万壑自然景观的主要原因,每年流失的土壤约16亿吨,据此回答问题。 小题1:黄土高原水土流失严重,主要人为原因是( ) A.长期以来的毁林开荒 B.黄土以粉砂颗粒为主 C.土壤疏松,降水变率大 D.干旱和大风现象 小题2:保持水土的生物措施是( )    . A.平整土地 B.修水平梯田 C.深耕改土 D.植树种草 小题3:对黄土高原生态环境的表述,正确的是(   ) A....
【单选题】黄土高原土质疏松,植被稀少,水土流失十分严重,要搞好黄土高原的生态环境建设,下列措施不可取的是(  )
A.
退耕还林、还草
B.
缓坡开辟梯田,种植果树
C.
开垦陡坡种粮食
D.
控制放牧的牲畜数量
【简答题】Science can’t explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure and raise chances of recovering from a heart attack, reduce loneliness and s...
【简答题】Science can’t explain the power of pets,but many studies have shown that the company of pets can help lower blood pressure(血压) and raise chances of recovering from a heart attack,reduce loneliness and...
【单选题】下列关于HDL的叙述哪一项是正确的
A.
由脂肪组织向肝脏转运游离脂酸
B.
由肠向肝转运吸收的脂肪
C.
由肝向肝外组织转运内源性合成的脂类
D.
由肝向肝外组织转运胆固醇以便细胞利用
E.
由肝外组织向肝脏转运胆固醇并进行转化
【简答题】阅读理解。 Lots of families in Great Britain have one or more pets. Dogs are the favorite pets and there are about 6,000,000 0f them in Britain. The second favorite are cats (about 5,000,000) and the third...
【简答题】Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure and raise chances of recovering from a heart attack, reduce loneliness and s...
【简答题】A.Forbid children to have pets. B.Stop buying pets from Africa. C.Fight against more new diseases. D.Easily get infected by diseases from dogs.
相关题目: