未知题型 Geologists (at) the Hawaiian Volcano Observatory (rely on) (a number of) instruments to (studying) the volcanoes in Hawaii.A.atB.rely onC.a number ofD.studying

未知题型 (As) secretary of transportation, he worked to help the (bankrupt railroads) in the northeastern (United States) (solved) their financial problems.A.AsB.bankrupt railroadsC.United StatesD.solved

单项选择题 挤压刺激的方向一般是 A. 由近端到远端 B. 由远端到近端 C. 由整体到个别 D. 由粗大的到有选择的 E. 由不协调到协调