【单选题】用拼音输汉字时,字母“ü”要用英文字母( )代替
【单选题】Although he has lived with us for years, he _______ us much impression.
【单选题】Although he has lived with us for years, he ______ us much impression.
【单选题】用Windows进行文字输入时,需进行全角/半角切换,则按____。
【判断题】进行片中差异时,从已经称定总重量的20丸供试品中,依次用镊子取出1丸,分别精密称定重量,得各丸重量。
【单选题】A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an _____.
B.
opposed pistons engine
D.
horizontal acting engine
【单选题】Pistons for modern engines are made of _______.
【单选题】An advantage of aluminum pistons, when compared to cast iron pistons is _____.
A.
greater high temperature strength
B.
better heat conductivity
C.
greater weight per cubic inch
D.
increased resistance to wear