One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； February 25th
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Multiple-choice question: The most commonly used desiccants in dryers are color-changing silica gel and anhydrous CaCl2. Their signs of failure are () and . A The silicone turns blue ； Calcium chloride forms hard lumps; B-silica turns red ； Calcium chloride forms hard lumps; C-silica turns red ； Calcium chloride melts and D-silica turns blue ； Calcium chloride melts. Answer: B. The silica gel turns red ； Calcium chloride forms hard lumps
The most commonly used desiccants in dryers are color-changing silica gel and anhydrous CaCl2. Their failure indicators are (B) and respectively. A The silicone turns blue ； Calcium chloride forms hard lumps; B-silica turns red ； Calcium chloride forms hard lumps; C-silica turns red ； Calcium chloride melts and D-silica turns blue ； Calcium chloride melting
B silicone turns red； Calcium chloride forms hard lumps
Silicone turns red； Calcium chloride melting
Silicone turns red； Calcium chloride forms hard lumps