劳动力辞职的原因有（ ）。

未分类题According to Lennon, we can inferA．landslips are helpful to visitors while visiting Jurassic Coast.B．the best time to visit Jurassic Coast is tide season.C．bad weather can make dinosaur fossils loose, thus more difficult obtained by tourists.D．finding dinosaur fossils can help tourists know more about the formation of the coast.

未分类题集体谈判是指那两方的谈判（ ）。B.工会C.雇主或雇主组织D.公司

未分类题Which of the following is the first step of the bypass operation?A．Thread up through the aorta to the top of the diseased artery.B．Push a needle through artery wall into the adjacent vein.C．Put a special catheter into one of the leg arteries.D．Block off the vein to allow blood to re-routed.

未分类题It can be concluded that after the new bypass treatment,A．the wire inside the vein widens the channel.B．blood flows in the opposite direction to the former one.C．the starved heart tissue is fed through the previous blood route.D．the patient was implanted with a new electronic heart.

未分类题According to Alan Paller, we can learn thatA．the private companies accepted the idea that their networks will be monitored for the sake of cyber-safety.B．the government proposes that it will not exchange cyber-threat data with the private companies.C．the data-sharing project will not allow the government to survey the private companies' networks.D．the data-sharing project can help the government persuade the private companies to accept some government surveillance.