cook

171. Errors: B --> "be ", / E: "would", "in order that" is acceptable.

179. B, even if you change "help in rescue of 改为help to rescue此题" , is still wrong because " and this" --> 1, this --> vague , 2. fused sentence

181. Sth required of sb ( logical subject) to do sth ==>  You may try to read like this: sth is required to do sth by sb , Why choose B, you can refer to OG , very clear.

cook

For your reference:

181 (Because of) the enoromous rearch and development expenditures(介宾) required (to surrive)in the electronics industry( 修饰语),an industry (subjective) marked by rapid innovation and volatile demand,such firms(同位语"subjective") tends ( Verb) to be very large.