【单选题】The Corsi research team hypothesised that ______.
A.
toxic chemicals can pass from air to water.
B.
pollution is caused by dishwashers and baths.
C.
city water contains insufficient chlorine.
D.
household appliances are poorly designed
【判断题】计数器的PV端最大能够设置的数为32768
【单选题】下列关于构造方法的描述中,错误的是( )
B.
如果在一个类中没有定义构造方法,系统会自动为这个类创建一个默认的构造方法
C.
默认的构造方法没有参数,在其方法体中没有任何代码
D.
当类中显示定义了构造方法,系统也会为这个类创建一个默认的构造方法
【单选题】()是金属材料在静载荷作用下抵抗变形和不破坏的能力
【单选题】The reader learns that toxic chemicals get into our food________. 查看材料
A.
when plastic becomes small enough to enter our food chain
B.
because other animals are being killed by plastic
C.
because plastic does not biodegrade
D.
from plastic bags from supermarkets
【判断题】硬度是金属材料在静载荷作用下,抵抗变形和破坏的能力。
【单选题】金属材料在静载荷作用下,抵抗变形和破坏的能力称为