正确答案: B

2型

题目：大部分的植物油需要()型化学品船运输。

解析：B

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举一反三的答案和解析：

[单选题]What is defined as an area outside sea areas A1, A2 and A3?

A4

[单选题]示位标该装置的总重量不超过：

8公斤

[单选题]与脊髓相连的周围神经是______。

脊神经

[单选题]第二组：Magnetic pickup (MPU) sensors are devices which can be used in conjunction with electronic control modules for monitoring of parameters such as speed, direction of rotation and a variety of alarm conditions. MPU sensors are available in various sizes and types. Following are some guidelines for their selection on industrial engines. MPUs are located near a flywheel, camshaft or other type of gear with rotation relative to engine speed. The passing of the gear teeth through the MPU tip (pole) generates a voltage and frequency. This frequency is converted to a speed reference by a control module. It should be noted here that most MPUs will develop similar signals. However, the magnitude and strength of the signal is dependent on the size of the sensor in relation to the gear teeth, the clearance between the pole piece and the gear teeth, and various other factors. As a general rule of thumb, the following standards should be met:①Dimension of tooth top surface should be equal to or more than the pole piece diameter.

①②③