霍利菲尔德体重增到了210磅。Holyfield has bulked up to 210 pounds using weights.大部分增稠剂来源于植物。Most of the thickeners are of plant origin.用多少增稠剂？How much thickener is used?...
The heptane compound has a primary purpose as a plasticizer for doublebase propellant systems.化合物庚烷的主要用途是作为双基推进剂的增塑剂.However, it is difficult to produce multi branched i heptane and restrain its cracking.正庚烷异构化的难点在于高选择性地...