数控机床一种行程极限是由机床行程范围决定的最大行程范围,用户()改变,该范围由参数决

题型:单项选择题

问题:

数控机床一种行程极限是由机床行程范围决定的最大行程范围,用户()改变,该范围由参数决定,也是数控机床的软件超程保护范围。

A、可以;

B、能够;

C、自行;

D、不得。

考点:铣工考试数控铣工考试数控铣工考试题库
题型:单项选择题
判断句子与图意是否一致,一致打“√”,不一致打“×”。
( ) 1. I like the pants.
( ) 2. This is my blouse.
( ) 3. It's a sweater.
( ) 4. He is wearing a skirt.
题型:单项选择题

Frank Adwood, CFA, is the chief compliance officer for Nills Investment Limited. Frank institutes a new policy requiring the pro rata distribution of new security issues to all discretionary accounts for which the new issues are appropriate. The policy does not provide for the distribution of new issues to non-discretionary accounts, but this is disclosed to all existing and potential clients. Did Frank most likely violate any CFA Institute Standards of Professional Conduct()

A. No.

B. Yes, because the distribution policy fails to treat all discretionary accounts equally.

C. Yes, because disclosure of inequitable allocation methods does not fulfill the duty for fail and equitable trade allocation procedures.

题型:单项选择题

下图中弧线BDC为晨昏线,读后回答下列问题。

说明:B点为经线,晨昏线与极圈的交点,C点为回归线与晨昏线的交点。

(1)若B处的昼长是A处的两倍,则该图表示的是北半球_______日(节气),BD为_____线(晨或昏)。

(2)此时太阳直射点的经纬度位置是_________________,A点此时的地方时是_____时,C处此时的太阳

    高度是_____度。

(3)这一天中,A、B、C三地中正午太阳高度最小的地方是_______,黑夜时间最长的地方是_____。

(4)这一天温州昼_____(长、短)于夜,此日之后白昼将渐渐变______。

题型:单项选择题

以下关于生物变异和生物进化的叙述,正确的是()

A.由于种群基因频率的改变,生物进化后一定会形成新的物种

B.自然选择决定生物进化的方向

C.抗生素的使用使病原体产生了适应性的变异

D.基因突变是可遗传的,染色体变异是不可遗传的

题型:单项选择题

梵夾裝

更多题库