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【单选题】
上《鱼》一课时,教师事先在水盆里放了一条活鲫鱼,让学生仔细观察鱼的形状,鱼的表面、背鳍、胸鳍、尾鳍。然后,问学生各种鳍的作用是什么?学生一下给问住了。这时,教师用剪刀把鱼的尾鳍剪掉,结果学生发现水中无法前进了;他又把胸鳍及腹鳍剪掉,结果鱼体在失去平衡;再把背鳍剪掉,鱼只能一动不动地躺在喘气。通过观察,学生明白了各种鳍的作用。 什么教学原则A.
系统性原则
B.
启发性原则
C.
科学性与思想性相统一原则
D.
直观性原则
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【单选题】[6-89]Have the safety belts for ___been examined?
A.
total enclosed lifeboats
B.
totally enclosing lifeboats
C.
totally enclosed lifeboats
D.
total encloseing lifeboats
【单选题】【单选】Have the safety belts for______ been examined?
A.
total enclosed lifeboats
B.
totally enclosing lifeboats
C.
totally enclosed lifeboats
D.
total enclosing lifeboats
【单选题】[6-54]Have the safety belts for ___been examined?全封闭式救生艇的安全带已经检查过了吗?(ABD项表述不对)
A.
total enclosed lifeboats
B.
totally enclosing lifeboats
C.
totally enclosed lifeboats全封闭式救生艇
D.
total encloseing lifeboats
【单选题】safety deposit box 保险箱 Listen to the message on safety deposit boxes. Q: What does the speaker think the bank should have near the safety deposit box?
A.
A security guard.
B.
A police officer.
C.
A security camera.
D.
A bank employee.
【简答题】灭火器(..........er)
【单选题】________ the vessel have no safety radiotelegraphy certificate at the time of her delivery，she ________ be held to be unseaworthy．
A.
If／may
B.
Will／shall
C.
Should／would
D.
Would／should
【简答题】灭火器(......er)
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