如果加热炉热负荷不够,可适当增加燃气量,逐渐调节风门、燃烧器,使燃气达到呈()火焰的

题型:单项选择题

问题:

如果加热炉热负荷不够,可适当增加燃气量,逐渐调节风门、燃烧器,使燃气达到呈()火焰的最佳状态。

A.淡蓝色

B.橘黄色

C.深蓝色

D.暗红色

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题型:单项选择题

Dawn graduated several years ago. She __31__________(be) a successful model, and  31________(find) a job had not been a problem ─ until _33_________(recent).

When Dawn did start trying to find another type of job , she found in interview after interview that computer literacy(能力)was a must to   34    _____(employ).

__35_______ Dawn had always been afraid of learning computer while in college ─ our school didn’t require to learn computer at that time — she managed to get a degree __36_______ ever confronting(面对) a computer.

Finally, after months of searching for a job, Dawn failed. She had to admit that sidestepping (回避) computer literacy(读写能力) hadn’t been a good idea. _37______, She enrolled in a computer course at  38   ____adult vocational school.

__39__________(surprise), although she had been afraid of learning computer, she took to computers __40________much that after about a year she opened her own computer-based business.

题型:单项选择题

初中地理教学中,不仅形成学生地理表象、______的学习需要用直观教学方法,那些_______的教授往往也需要使用直观方法。

题型:单项选择题

初产妇,孕40周,临产后发现胎儿纵轴与母体纵轴相互垂直,血压正常,胎心率140次/分

根据以上情况判断不可能的胎方位是()

A.肩左后位

B.肩左前位

C.肩右后位

D.肩右前位

E.头位

题型:单项选择题

我国在1959年、1982年、1992年和()分别开展过四次大型的膳食调查。

A.2002年

B.2004年

C.2006年

D.2008年

题型:单项选择题

下列()在用于确定发运日期时不包含提及的日期。

A、to

B、till

C、before

D、after

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