The senator has long held to the general printable that no true work of art is obscene and thus that there is no conflict between the need to encourage free artistic expression and the need to protect the sensibilities of the public from obscenity. When well-known works generally viewed as obscene are cited as possible counterexamples, the senator justifies accepting the principle by saying that if these works really are obscene then they cannot be works of art.
The senator’s reasoning contains which one of the following errors

A．It seeks to persuade by emotional rather than intellectual means.

B．It contains an implicit contradiction.

C．It relies on an assertion of the senator authority.

D．It assumes what it seeks to establish.

E．(E) It attempts to justify a position by appeal to an irrelevant consideration.

船舶柴油机主机从低速加速到全速应逐渐加大油门是为了防止主机：（）.

A.超功率负荷

B.超热负荷

C.超机械负荷

D.超机械负荷和功率负荷