connecting Rod

The lower end of each piston rod is reduced in diameter to fit a bore in （）， this being secured to the piston rod by a nut.

理想运算放大器______。 A: Au为∞，rid为0，rod为∞ B: Au为∞，rid为∞，rod为0 C: Au为∞，rid为∞，rod为∞ D: 以上都不对

The outside diameter of the pipe is （） the diameter of the bore of the piston rod， the result being that an annular space formed between the piston rod and the pipe.

The lightning rod is one of his useful _______________________.

______, they went swimming. A: Being a hot day B: It was a hot day C: Due to a hot day D: The day being hot

It was ____ everyone went to the beach. A: such a hot weather that B: a so hot weather that C: such hot weather that D: too hot weather that

In our city, it's ____ in July, but it is even ____in August. A: hotter, hottest B: hot, hot C: hotter, hot D: hot, hotter

You mustn't put _____ near the baby. A: anything hot B: something hot C: hot something D: hot anything

An object is said ______ if its temperature is much higher than that of our bodies. A: to be hot B: as being hot C: hot D: as hot